Science Practice Test 3

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You’ll face Science section, just like in the real exam.
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1 / 40

Which tool is used to measure temperature?

A) Balance

B) Thermometer

C) Stopwatch

D) Graduated cylinder

2 / 40

Which of the following is a nonrenewable resource?

A) Wind

B) Solar

C) Oil

D) Hydropower

3 / 40

Which gas is most important for human breathing?

A) Carbon dioxide

B) Oxygen

C) Nitrogen

D) Helium

4 / 40

Which type of plate boundary forms mountains when two plates push together?

A) Divergent

B) Convergent

C) Transform

D) Neutral

5 / 40

A push or pull acting on an object is known as a .

6 / 40

The organelle responsible for producing energy in a cell is the .

7 / 40

The process of liquid water changing into gas is called .

8 / 40

Rain, snow, sleet, and hail are all forms of .

9 / 40

The energy Earth receives from the Sun travels through space by .

10 / 40

The smallest unit of life is the .

11 / 40

Which factors increase the chances of erosion?

A) Heavy rainfall

B) Strong winds

C) Dense plant roots

D) Steep slopes

12 / 40

Which organisms perform photosynthesis?

A) Grass

B) Mushrooms

C) Oak trees

D) Cyanobacteria

13 / 40

Which are signs that a chemical change has occurred?

A) Color change

B) Formation of gas bubbles

C) Change of state

D) Release of heat

14 / 40

Which situations demonstrate chemical reactions?

A) Wood burning

B) Sugar dissolving

C) Cooking an egg

D) Water freezing

15 / 40

Which items are renewable energy sources?

A) Coal

B) Solar

C) Wind

D) Natural gas

16 / 40

Which processes are part of the water cycle?

A) Evaporation

B) Condensation

C) Precipitation

D) Photosynthesis

17 / 40

Which human activities contribute to air pollution?

A) Car exhaust

B) Factory emissions

C) Planting trees

D) Burning fossil fuels

18 / 40

Which examples show forces acting on an object?

A) A magnet pulling a nail

B) A book sitting still on a table

C) A person pushing a cart

D) Wind blowing a leaf

19 / 40

Which organisms are consumers?

A) Deer

B) Frog

C) Pine tree

D) Eagle

20 / 40

Which factors can affect how quickly a solute dissolves in water?

A) Temperature

B) Stirring

C) Shape of the container

D) Size of solute particles

21 / 40

Which organism helps break down dead plants and animals?

A) Hawk

B) Grass

C) Bacteria

D) Fish

22 / 40

Which property of light explains why a pencil looks bent in a glass of water?

A) Reflection

B) Absorption

C) Refraction

D) Scattering

23 / 40

Which part of a plant transports water from the roots to the leaves?

A) Phloem

B) Xylem

C) Stomata

D) Pistil

24 / 40

What instrument is best for measuring the mass of an object?

A) Thermometer

B) Graduated cylinder

C) Balance

D) Stopwatch

25 / 40

Which type of energy is stored in food molecules?

A) Mechanical energy

B) Chemical energy

C) Solar energy

D) Sound energy

26 / 40

Which change is a chemical change?

A) Water boiling

B) Ice melting

C) Iron rusting

D) Breaking a rock

27 / 40

Which body system includes the brain and spinal cord?

A) Muscular system

B) Nervous system

C) Endocrine system

D) Respiratory system

28 / 40

Which term describes an explanation supported by repeated evidence and widely accepted by scientists?

A) Hypothesis

B) Theory

C) Variable

D) Trial

29 / 40

Which force pulls objects toward the center of Earth?

A) Magnetism

B) Gravity

C) Friction

D) Electricity

30 / 40

Which gas do humans release during respiration?

A) Oxygen

B) Carbon dioxide

C) Nitrogen

D) Hydrogen

31 / 40

Which organism is a producer in most ecosystems?

A) Fox

B) Tree

C) Mushroom

D) Worm

32 / 40

What type of bond holds atoms together by sharing electrons?

A) Ionic bond

B) Covalent bond

C) Metallic bond

D) Hydrogen bond

33 / 40

Which process moves water from Earth’s surface into the atmosphere?

A) Condensation

B) Precipitation

C) Evaporation

D) Runoff

34 / 40

Which layer of Earth contains the tectonic plates?

A) Inner core

B) Outer core

C) Mantle

D) Lithosphere

35 / 40

Which energy transformation occurs when a flashlight is turned on?

A) Electrical → Light

B) Chemical → Sound

C) Mechanical → Thermal

D) Nuclear → Light

36 / 40

A scientist wants to test whether water temperature affects how fast sugar dissolves. What is the independent variable?

A) Amount of sugar

B) Water temperature

C) Type of container

D) Amount of water

37 / 40

What causes Earth to experience day and night?

A) Earth’s revolution around the Sun

B) Earth’s rotation on its axis

C) Earth’s distance from the Sun

D) Changes in Earth’s atmosphere

38 / 40

Which organ system is responsible for removing waste products from the body?

A) Circulatory system

B) Digestive system

C) Excretory system

D) Nervous system

39 / 40

Which state of matter has particles that move freely and spread out to fill their container?

A) Solid

B) Liquid

C) Gas

D) Plasma

40 / 40

What is the main function of the cell membrane?

A) To store nutrients

B) To control what enters and leaves the cell

C) To produce energy

D) To build proteins

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