Grade 7 Science Exam Questions

Grade 7 Science Exam Questions

• Instructions for answering the exam: Answer all questions on the provided answer sheet. Clearly shade your selection. If you make a mistake, rub it out and mark the correct answer.

Question 1

• What is the charge of a neutron?
  • No charge

Question 2

• What is the number of electrons in the first shell of an atom?
  • 2

Question 3

• What is the relationship between the number of protons and electrons in an atom?
  • The number of protons is equal to the number of electrons.

Question 4

• What is the term for the arrangement of electrons in energy levels around the nucleus of an atom?
  • Electron configuration

Question 5

• What is the atomic number of an atom equal to?
  • The number of protons in the nucleus

Question 6

• What is the atomic mass of an atom equal to?
  • The number of protons and neutrons in the nucleus

Question 7

• What is the maximum number of electrons that can occupy the second shell?
  • 8

Question 8

• Calcium has an atomic number of 20. What is the electronic configuration of the element Calcium (Ca)?
  • 2, 8, 8, 2

Question 9

• What do the circles represent in a Dot and Cross diagram?
  • Electrons

Question 10

• Chlorine has an atomic number of 17. What is the electronic configuration of the element Chlorine (CI)?
  • 2, 8, 7

Question 11

• What happens to the particles in a liquid as they are heated?
  • They move faster and escape from the surface of the liquid.

Question 12

• What is an element?
  • A substance made up of only one type of element.

Question 13

• What is the term for the fundamental building block of all materials?
  • Atom

Question 14

• What happens to the particles in a gas as it is cooled?
  • They move slower and come closer together.

Question 15

• What is the term for a pure substance that is made up of two or more different types of atoms chemically combined?
  • Compound

Question 16

• What occurs when the particles in a gas are cooled?
  • They move slower and come together.

Question 17

• What is the fundamental building block of all materials?
  • Atom

Question 18

• What is the term for a pure substance that is made up of two or more different types of atoms chemically combined?
  • Compound

Question 19

• What is matter?
  • Anything that has mass and volume.

Question 20

• What is an atom?
  • A small particle that makes up matter.

Question 21

• Which of the following is an example of an element?
  • Sodium chloride (NaCl)

Question 22

• Which part of an atom has a positive charge?
  • Proton

Question 23

• What is the atomic number of an element?
  • The number of protons in the nucleus of an atom

Question 24

• What does the number of protons in an atom determine?
  • The element's identity

Question 25

• Which of the following particles is found outside the nucleus of an atom?
  • Electron

Question 26

• Which of the following elements is a noble gas?
  • Helium (He)

Question 27

• What is the atomic symbol for Sodium?
  • Na

Question 28

• Which particle is neutral and has no charge?
  • Neutron

Question 29

• What is a molecule?
  • Two or more atoms bonded together

Question 30

• Which of the following is a compound?
  • Water (H₂O)

Question 31

• What is the simplest form of a substance that cannot be broken down chemically?
  • Element

Question 32

• How many atoms are in a molecule of carbon dioxide (CO₂)?
  • Three

Question 33

• Which of the following is true about a compound?
  • It consists of two or more different types of atoms chemically bonded.

Question 34

• Which of the following compounds contains two different elements?
  • NaCl

Question 35

• What is the difference between a molecule and a compound?
  • A molecule can have one type of element, while a compound has two or more.

Question 36

• Which of the following is true about elements in the same group on the periodic table?
  • They have similar chemical properties

Question 37

• Which of the following elements is a metalloid?
  • Boron (B)

Question 38

• Which of the following is an example of a molecule made up of two atoms of the same element?
  • Nitrogen (N₂)

Question 39

• What is a chemical reaction?
  • A process that breaks and forms bonds between atoms.

Question 40

• Which is the main difference between mixtures and compounds?
  • Mixtures are not chemically combined, while compounds are chemically combined.

Question 41

• What is the term for the smallest particle that all matter is made of?
  • Atom

Question 42

• How many electrons can the first shell of an atom hold?
  • 2

Question 43

• What is formed when two or more different types of atoms are bonded together?
  • Molecule

Question 44

• What is the term for the arrangement of atoms in an element?
  • Molecule

Question 45

• What is the purpose of the atomic number of an element?
  • To determine the number of protons in the nucleus.

Question 46

• What is the term for a group of atoms bonded together?
  • Molecule

Question 47

• What is the location of protons and neutrons in an atom?
  • In the nucleus.

Question 48

• What is the maximum electron capacity of the 2nd shell?
  • 8

Question 49

• What is the charge of an electron?
  • Negative

Question 50

• What is the term for a group of atoms bonded together?
  • Molecule

Question 51

• What determines the identity of an element?
  • Number of protons

Question 52

• What is the primary process by which sediments are converted into sedimentary rocks?
  • Compaction and cementation

Question 53

• Which of the following statements best describes the relationship between sedimentary rocks and metamorphic rocks?
  • Sedimentary rocks can undergo heat and pressure to become metamorphic rocks.

Question 54

• Which of the following statements about the formation of sedimentary rocks is not correct?
  • The rock cools slowly underground

Question 55

• Rocks that have been formed from other rocks due to intense heat and pressure are called:
  • Metamorphic rocks

Question 56

• Which of the following is not considered an agent of change in the rock cycle?
  • Time

Question 57

• What role does chemical reaction play in the rock cycle?
  • Chemical reactions are essential in weathering of rocks and the formation of sediments

Question 58

• What happens to metamorphic rocks when subjected to extreme heat?
  • They can melt to form magma

Question 59

• What type of rock is formed by the cooling and solidification of lava?
  • Extrusive igneous rock

Question 60

• What geological process involves breaking down rocks into smaller fragments?
  • Weathering and erosion

Question 61

• Which of the following describes how igneous rocks are formed?
  • From the cooling and solidification of magma or lava

Question 62

• What influences the texture of igneous rocks?
  • The rate of cooling of magma or lava

Question 63

• Sedimentary rocks are typically formed through which process?
  • Accumulation and cementation of sediments

Question 64

• Which statement accurately represents metamorphic rocks?
  • They can originate from any pre-existing rock type

Question 65

• What is a characteristic feature of metamorphic rocks?
  • Foliation texture

Question 66

• What was likely the first type of rock to form in the Earth's crust was most likely:
  • Igneous

Question 67

• What happens to rocks if they are buried deep in the Earth at high temperatures and pressures?
  • They break down into smaller particles

Question 68

• What is the initial stage of a star's life cycle?
  • Protostar

Question 69

• During which stage does a star, like our Sun, spend most of its life?
  • Main sequence star

Question 70

• What happens to a star once it exhausts its hydrogen fuel?
  • It becomes a red giant

Question 71

• What is a characteristic of a white dwarf star?
  • It emits no light

Question 72

• What defines a black hole in terms of gravity?
  • Light cannot escape its gravitational pull

Question 73

• What is the final stage of a massive star's life cycle after the supernova?
  • Black Hole

Question 74

• What happens to the outer layers of a star when it becomes a red giant?
  • They expand massively and become cooler

Question 75

• What is created during a supernova event?
  • New stars only

Question 76

• The variable that you measure is the –
  • Dependent Variable

Question 77

• How many independent variables can be tested in a controlled experiment?
  • One

Question 78

• What is a prediction?
  • An educated guess

Question 79

• An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, same amount of sunlight, and the same amount of liquid. In this investigation, what is the independent variable.
  • Different liquids

Question 80

• Mr. S set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. Identify the dependent variable.
  • Distance traveled by the ball

Question 81

• A student is planning an experiment to find out how the height from which he drops a ball affects how high the ball bounces. What is the control variable?
  • The ball used

Question 82

• The measurable factor in an experiment is known as the:
  • Dependent Variable

Question 83

• An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid: water, apple juice, or milk. What should be kept constant?
  • Type of plant, soil, amount of sunlight

Question 84

• In an experiment to determine if temperature affects the solubility of sugar in water, what is the independent variable.
  • The temperature of the water

Question 85

• If you are conducting an experiment to see if the type of fertilizer affects plant growth, what would the dependent variable be?
  • The growth of the plants

Question 86

• What is the primary role of an independent variable in an experiment?
  • It is changed by the researcher to observe an effect.

Question 87

• Which statement accurately describes a dependent variable?
  • It is the outcome measured in response to the independent variable.

Question 88

• What is the significance of control variables in an experiment?
  • They ensure changes to the dependent variable are due to the independent variable.

Question 89

• In a well-designed experiment, how should independent variables be presented?
  • On the x-axis of a graph.

Question 90

• Which statement about relationships between independent and dependent variables is true?
  • The dependent variable is expected to change in response to the independent variable.

Question 91

• Which of the following describes control variables?
  • They are kept constant to prevent them from influencing the dependent variable.

Question 92

• What could happen if control variables are not properly managed in an experiment?
  • Results may be invalid due to extraneous influences.