SCIENCE 8 REVIEWER TERM 1 EXAMINATION

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Progress matters more than perfection. Stay confident and good luck!

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Gemma Valdez

Philippines

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SCIENCE 8 REVIEWER TERM 1 EXAMINATION


Froggy Jumps SCIENCE 8 REVIEWER TERM 1 EXAMINATIONVersion en ligne Progress matters more than perfection. Stay confident and good luck! par Gemma Valdez 1 What is the scientific study of genes, heredity, and their transmission and variation? a Chemistry b Genetics c Nuclear Science 2 Which graphic tool is used to determine the probability of the combinations of genotypes an offspring can inherit from its parents? a dihybrid cross b Punnett square c segregation & assortment 3 What will be the phenotypic ratio if both parents are homozygous for tallness? a 4 tallness:0 shortness b 4 shortness:0 tallness c 2 tallness:2 shortness 4 Using a Punnett square, what will be the genotypic ratio if both parents have recessive traits for tallness? a 4TT:0tt b 2TT:2tt c 4tt:0TT 5 A student is creating a genetics poster showing the cross Bb × Bb, where B = black fur (dominant) and b = white fur (recessive). Which prediction should be included in the poster? a 1 black:1 white b 3 black:1 white c 1 black:3 white 6 The water cycle involves the continuous movement of water on Earth. What is the process called when liquid water changes into water vapor? a Condensation b Evaporation c Collection 7 A flow chart shows: Plants → Animals → Atmosphere → Plants. What does this flow chart demonstrate? a rock cycle b carbon dioxide-oxygen cycle c nitrogen cycle 8 Your class is creating a labeled diagram showing how plants and animals interact in the carbon dioxide-oxygen cycle. Which label should be added between plants and animals? a Plants release carbon dioxide used by animals. b Animals release oxygen used by plants. c Plants release oxygen used by animals. 9 A diagram shows that fewer trees are present in a forested area. Which part of the water cycle is most likely to decrease? a Condensation b Collection c Transpiration 10 Your class is designing a poster showing how carbon moves through living things. Which sequence should be shown? a Animals → Oxygen → Plants → Carbon dioxide b Carbon dioxide → Plants → Animals → Carbon dioxide c Carbon dioxide → Animals → Plants → Carbon dioxide 11 Photosynthesis is an important process performed by plants. What is photosynthesis? The process of ________. a releasing oxygen only b absorbing minerals from soil c converting light into chemical energy 12 Plants need several materials to carry out photosynthesis. Which is a raw material needed for photosynthesis? a Carbon dioxide b Chlorophyll c Glucose 13 Photosynthesis occurs in specialized structures of plant cells. Where does it take place? a Nucleus b Mitochondria c Chloroplast 14 Plants are classified as autotrophs. What does this mean? They . a make their own food b eat other organisms c depend on animals for food 15 If the light-dependent reaction takes place in the thylakoid membrane, where does the light-independent reaction occurs? a stroma b cytoplasm c granum 16 Your group is completing a flow chart of photosynthesis: Carbon dioxide + Water + ______ → Glucose + Oxygen. Which term should be placed in the blank? a chlorophyll b Sunlight c ATP & NADPH 17 A teacher asks you to identify the product released into the atmosphere during photolysis. Which substance should you choose? a NADPH b Oxygen c Carbon dioxide 18 A scientist removes Photosystem II from a plant. Which process would be most directly affected? a Glucose storage b Photolysis of water c Carbon dioxide absorption 19 Two investigation plans are proposed to test if sunlight is necessary for photosynthesis: Plan A: Cover one leaf with foil and leave another exposed.; Plan B: Water two plants equally without changing sunlight. Which plan is more appropriate? a Plan A because it changes water availability. b Plan A because it tests the effect of sunlight. c Plan B because it uses two plants. 20 A class is creating a labeled diagram of the light-dependent reactions. Which sequence BEST represents the process? a Carbon dioxide → Photosystem I → Glucose b Sunlight → Photosystem II → Oxygen + ATP + NADPH c Water → Glucose → Carbon dioxide 21 Cellular respiration is an important process in living cells. What is the main energy currency of the cell? a ADP b ATP c NADPH 22 Living cells need energy to carry out their various activities. This energy is produced in a specific organelle. Which organelle is known as the 'powerhouse of the cell'? a Chloroplast b Vacuole c Mitochondria 23 Glycolysis is the first stage of cellular respiration. Where does glycolysis occur? a Nucleus b Cytoplasm c Cell membrane 24 ATP is important for many activities inside the cell. Why is ATP important to living cells? a It stores and supplies energy for cell processes. b It stores genetic information for cell growth. c It provides oxygen for cellular respiration. 25 Aerobic and anaerobic respiration produce different amounts of energy. Why does aerobic respiration produce more ATP than anaerobic respiration? a It uses glucose without breaking it down. b It occurs only inside the cytoplasm. c It continues through additional stages using oxygen. 26 During an experiment, oxygen is removed from a flask containing yeast cells. Which process will most likely occur? a Lactic acid fermentation b Alcoholic fermentation c Photosynthesis 27 Glycolysis produces pyruvate before the next stages of respiration. What should happen next during aerobic respiration? Pyruvate ________. a combines with oxygen to form glucose b returns to glucose immediately c moves into the mitochondria for further processing 28 Analyze the sequence below. Glucose → Pyruvate → Acetyl-CoA → ATP Production Which stage occurs immediately after glycolysis? a Electron transport chain b Fermentation c Pyruvate conversion 29 A student claims that anaerobic respiration is more efficient because it does not need oxygen. Which evaluation is most accurate? a Correct, because anaerobic respiration produces more ATP. b Correct, because oxygen prevents ATP formation. c Incorrect, because anaerobic respiration produces less ATP. 30 A student is making a flowchart showing the stages of aerobic respiration. Which sequence should be used? a Glycolysis → Pyruvate conversion → Krebs cycle → ETC b ETC → Glycolysis → Krebs cycle → Fermentation c Krebs cycle → Glycolysis → ETC → Pyruvate conversion 31 Scientists developed different models to explain the structure of matter. Which scientist is associated with the earliest idea of the atom in the timeline? a John Dalton b Democritus c Ernest Rutherford 32 The atomic model changed as scientists gained new evidence. Which scientist proposed the Solid Sphere Model? a John Dalton b Democritus c Ernest Rutherford 33 Scientists arranged electrons in different ways in their models. Who proposed the Planetary Model? a Democritus b John Dalton c Niels Bohr 34 Scientific ideas about atoms changed over time. Why is a timeline useful when studying the development of the atomic model? It shows ________. a the sequence of scientific development b the color of every model used c the size of every atom 35 An atom can be represented using different parts. Which description BEST represents the general structure of an atom? a A single solid region with no empty space. b A central nucleus surrounded by electron shells. c A group of particles spread evenly throughout. 36 Electron shells can be shown as layers surrounding the nucleus. How should the electron shells be represented? a As surrounding layers the nucleus b As squares placed beside the nucleus c As circles placed randomly around the nucleus 37 The historical models can be arranged according to when they were developed. Which sequence should come first? a Dalton → Democritus → Thomson → Rutherford b Thomson → Dalton → Rutherford → Democritus c Democritus → Dalton → Thomson → Rutherford 38 The historical timeline shows several changes in atomic models. What can be inferred from this pattern? a Atomic models changed as scientific understanding developed. b Scientists stopped using evidence to study atoms. c Earlier scientists already knew the complete structure. 39 A timeline places Dalton after Rutherford. How should this timeline be evaluated? a It is correct because the order does not matter. b It is correct because all scientists are included. c It needs revision because the historical order is incorrect. 40 An atomic structure diagram is being prepared for classroom display. Which design would BEST show the nucleus and electron shells? a Several circles placed randomly beside the nucleus b A single circle containing the nucleus and all shells c A central nucleus surrounded by organized electron shells 41 Atoms contain three main types of subatomic particles. Which symbol represents a proton? a p- b p+ c e- 42 Subatomic particles are found in different regions of an atom. Which particle is found outside the nucleus? a Electron b Neutron c Nucleon 43 The atomic number identifies an important feature of an atom. What does the atomic number represent? a Proton b Energy levels c Electron 44 Protons and neutrons are located together in the atom. Why are protons and neutrons found in the nucleus? They ________. a make up most of the atomic mass b move around the nucleus c have very small masses 45 The mass number is used to determine the particles in the nucleus. How can the number of neutrons be determined? a Subtract the atomic number from the mass number b Add the atomic and mass numbers c Divide the mass number by two

SCIENCE 8 REVIEWER TERM 1 EXAMINATION

Froggy Jumps

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SCIENCE 8 REVIEWER TERM 1 EXAMINATIONVersion en ligne

par Gemma Valdez

What is the scientific study of genes, heredity, and their transmission and variation?

Which graphic tool is used to determine the probability of the combinations of genotypes an offspring can inherit from its parents?

What will be the phenotypic ratio if both parents are homozygous for tallness?

Using a Punnett square, what will be the genotypic ratio if both parents have recessive traits for tallness?

A student is creating a genetics poster showing the cross Bb × Bb, where B = black fur (dominant) and b = white fur (recessive). Which prediction should be included in the poster?

The water cycle involves the continuous movement of water on Earth. What is the process called when liquid water changes into water vapor?

A flow chart shows: Plants → Animals → Atmosphere → Plants. What does this flow chart demonstrate?

Your class is creating a labeled diagram showing how plants and animals interact in the carbon dioxide-oxygen cycle. Which label should be added between plants and animals?

A diagram shows that fewer trees are present in a forested area. Which part of the water cycle is most likely to decrease?

Your class is designing a poster showing how carbon moves through living things. Which sequence should be shown?

Photosynthesis is an important process performed by plants. What is photosynthesis? The process of ________.

Plants need several materials to carry out photosynthesis. Which is a raw material needed for photosynthesis?

Photosynthesis occurs in specialized structures of plant cells. Where does it take place?

Plants are classified as autotrophs. What does this mean? They .

If the light-dependent reaction takes place in the thylakoid membrane, where does the light-independent reaction occurs?

Your group is completing a flow chart of photosynthesis: Carbon dioxide + Water + ______ → Glucose + Oxygen. Which term should be placed in the blank?

A teacher asks you to identify the product released into the atmosphere during photolysis. Which substance should you choose?

A scientist removes Photosystem II from a plant. Which process would be most directly affected?

Two investigation plans are proposed to test if sunlight is necessary for photosynthesis: Plan A: Cover one leaf with foil and leave another exposed.; Plan B: Water two plants equally without changing sunlight. Which plan is more appropriate?

A class is creating a labeled diagram of the light-dependent reactions. Which sequence BEST represents the process?

Cellular respiration is an important process in living cells. What is the main energy currency of the cell?

Living cells need energy to carry out their various activities. This energy is produced in a specific organelle. Which organelle is known as the 'powerhouse of the cell'?

Glycolysis is the first stage of cellular respiration. Where does glycolysis occur?

ATP is important for many activities inside the cell. Why is ATP important to living cells?

Aerobic and anaerobic respiration produce different amounts of energy. Why does aerobic respiration produce more ATP than anaerobic respiration?

During an experiment, oxygen is removed from a flask containing yeast cells. Which process will most likely occur?

Glycolysis produces pyruvate before the next stages of respiration. What should happen next during aerobic respiration? Pyruvate ________.

Analyze the sequence below. Glucose → Pyruvate → Acetyl-CoA → ATP Production Which stage occurs immediately after glycolysis?

A student claims that anaerobic respiration is more efficient because it does not need oxygen. Which evaluation is most accurate?

A student is making a flowchart showing the stages of aerobic respiration. Which sequence should be used?

Scientists developed different models to explain the structure of matter. Which scientist is associated with the earliest idea of the atom in the timeline?

The atomic model changed as scientists gained new evidence. Which scientist proposed the Solid Sphere Model?

Scientists arranged electrons in different ways in their models. Who proposed the Planetary Model?

Scientific ideas about atoms changed over time. Why is a timeline useful when studying the development of the atomic model? It shows ________.

An atom can be represented using different parts. Which description BEST represents the general structure of an atom?

Electron shells can be shown as layers surrounding the nucleus. How should the electron shells be represented?

The historical models can be arranged according to when they were developed. Which sequence should come first?

The historical timeline shows several changes in atomic models. What can be inferred from this pattern?

A timeline places Dalton after Rutherford. How should this timeline be evaluated?

An atomic structure diagram is being prepared for classroom display. Which design would BEST show the nucleus and electron shells?

Atoms contain three main types of subatomic particles. Which symbol represents a proton?

Subatomic particles are found in different regions of an atom. Which particle is found outside the nucleus?

The atomic number identifies an important feature of an atom. What does the atomic number represent?

Protons and neutrons are located together in the atom. Why are protons and neutrons found in the nucleus? They ________.

The mass number is used to determine the particles in the nucleus. How can the number of neutrons be determined?