Science Practice Test 2

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Science Practice Test 2

1 / 40

The layer of gases surrounding Earth is called the .

2 / 40

The energy source for nearly all ecosystems on Earth is the .

3 / 40

A scientist’s testable explanation for observations is called a(n) .

4 / 40

The galaxy that contains our solar system is called the .

5 / 40

Speed is calculated by dividing distance by .

6 / 40

The smallest particle of an element that retains its properties is a(n) .

7 / 40

Which THREE are negative effects of deforestation?

8 / 40

Which TWO are true about natural selection?

9 / 40

A data table shows test scores before and after tutoring. Which TWO conclusions are valid?

10 / 40

Which THREE are ways to reduce water pollution?

11 / 40

Which TWO show a physical change?

12 / 40

Which THREE are biotic factors in an ecosystem?

13 / 40

Which TWO are important when designing a fair experiment?

14 / 40

Which TWO provide evidence for the theory of plate tectonics?

15 / 40

Which TWO are chemical properties?

16 / 40

Which THREE are basic needs for most plants to survive?

17 / 40

A graph shows no change in the dependent variable when the independent variable increases. This suggests:

18 / 40

How long does Earth take to complete one orbit around the sun?

19 / 40

A pulley system is used to lift a heavy box. What advantage does it provide?

20 / 40

Meiosis results in cells that have:

21 / 40

Increased greenhouse gases in the atmosphere cause Earth to:

22 / 40

Why do we see different phases of the moon?

23 / 40

A solution with pH 12 is:

24 / 40

Which organ system removes waste products from the blood?

25 / 40

In a drug effectiveness study, the amount of medicine given is the:

26 / 40

What process must happen before precipitation can occur?

27 / 40

If you double the distance between two magnets, the magnetic force between them will:

28 / 40

What role do decomposers play in an ecosystem?

29 / 40

A student measures plant height daily. The best way to display growth over time is a:

30 / 40

At a convergent boundary where two continental plates collide, what forms?

31 / 40

In 2H₂ + O₂ → 2H₂O, what does the “2” before H₂O tell us?

32 / 40

Genes are segments of DNA that contain instructions for making:

33 / 40

In a vitamin study, one group takes vitamins and another group takes fake pills. The group taking fake pills is important because it:

34 / 40

Which best describes climate?

35 / 40

What type of energy does a moving bicycle have?

36 / 40

Where does most photosynthesis occur in a plant?

37 / 40

Before starting an experiment, a scientist writes: “If plants receive more sunlight, then they will produce more flowers.” This statement is a:

38 / 40

What type of rock forms from layers of sediment pressed together over time?

39 / 40

When water boils and becomes steam, what happens to its molecules?

40 / 40

What is the basic unit of structure and function in living organisms?

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