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Worksheets

Semester Exam 2024

Total questions: 42

Worksheet time: 21mins

Name
Class
Date
1.

Which instrument measures the length of an object?

a)

beaker

b)

graduated cylinder

c)

triple beam balance

d)

meter stick

2.

What is the mass that is shown on each of the triple beam balances?

a)

480.5g

b)

408.5g

c)

485.0g

3.

Measure the following volumes.

a)

85 ml

b)

82 ml

c)

80 ml

4.

If you do not understand a direction or part of a laboratory procedure, you should ________.

a)

figure it out as you do the lab.

b)

try several methods until something works.

c)

ask the teacher before proceeding.

d)

skip it and go on to the next part

5.

After completing an experiment, all chemical wastes should be

a)

left at your lab station for the next class.

b)

disposed of according to your teacher’s directions.

c)

dumped in the sink.

d)

taken home.

6.

Horseplay, practical jokes, or pranks in the lab are ________________.

a)
always against the rules.
b)

okay.

c)
not dangerous.
d)
Okay if you are working alone.
7.

When you work in the lab, long hair must be _______________.

a)
Cut off
b)
Tied back out of the way
c)
Held by both hands
d)
Combed nicely
8.

Lisa boiled 5 cups of water in the pot. This is an example of a (n) _______________.

a)

Qualitative observation

b)

Quantitative observation

c)

Inference

d)

Conclusion

9.

The grass turned brown and stiff at the end of July. This is an example of a (n) _______.

a)

Hypothesis

b)

Qualitative observation

c)

Quantitative observation

d)

Inference

10.

For an experiment, a scientist put lime at the base of tomato plant A and baking soda at the base of tomato plant B. She then sealed the plants in plastic bags. Tomato plant A eventually died, and tomato plant B stayed healthy. What was the dependent variable in this experiment?

a)

Type of plant grown for the test

b)

Response of the plants to each substance

c)

Substance at the base of each plant

d)

Plastic bags wrapped around each plant

11.

A student planted the same kind of seeds in pots A and B. She planted five seeds in pot A and five seeds in pot B. The amount and type of soil in both pots was the same. She added the same amount of water to both pots each week. Pot A was placed in a sunny window. Pot B was placed in a dark room. After four weeks, she observed the plants in both pots. The plants in pot A were green, with tall, thick stems. The plants in pot B were yellow, with tall, thin stems. Which statement best explains why the plants in pot A were different from the plants in pot B?

a)

Pot A contained more soil than pot B.

b)

Pot A contained more seeds than pot B.

c)

Pot A received more sunlight than pot B.

d)

Pot A received more water than pot B.

12.

What is the smallest particle of matter?

a)

Cells

b)

Atoms

c)

Electricity

d)

Forces

13.

Which of the following examples is an element?

a)

Fe

b)

CO2

c)

H2O

d)

Salt water

14.

Carbon has a mass number of 12. Thus, it has ________ protons and ________ neutrons.

a)
6, 6
b)

12, 12

15.

What element does the Bohr model represent?

a)

K: Atomic# 19 Atomic Mass: 39

b)

Cl: Atomic# 17 Atomic Mass: 35

c)

Ar: Atomic# 18 Atomic Mass: 40

d)

F: Atomic# 9 Atomic Mass: 19

16.

A combination of substances that can easily separate into its original parts is known as a(n) __________.

a)

Compound

b)

Mixture

c)

Element

d)

Atom

17.

Substance that cannot be broken down into any other substances by chemical or physical means is a(n) __________.

a)

Element

b)

Mixture

c)

Compound

d)

Molecule

18.

Two or more different elements chemically combined is a(n) __________.

a)

Atom

b)

Mixture

c)

Molecule

d)

Compound

19.

Which mixture will be considered an example of a homogeneous mixture?

a)

A beaker of water and oil

b)

A beaker of sand and rocks

c)

A beaker of water and Kool-Aid powder

d)

A beaker of sand and water

20.

A balanced chemical reaction obeys the law of

a)

definite proportions.

b)

conservation of energy.

c)

conservation of matter.

d)

ideal gas.

21.

Melting point is an example of a ____________.

a)

Chemical property

b)

Physical property

22.

Baking Bread is an example of a ______________.

a)

Chemical Change

b)

Physical Change

23.

A saw cuts a log and creates sawdust is an example of a ______________.

a)

Chemical Change

b)

Physical Change

24.

The Statue of Liberty changes from copper to green is an example of a ______________.

a)

Chemical Change

b)

Physical Change

25.

Chocolate syrup dissolved in milk is an example of a ______________.

a)

Chemical Change

b)

Physical Change

26.

Leaves changing color in the fall is an example of a ______________.

a)

Chemical Change

b)

Physical Change

27.

Which is NOT a reactant in the chemical equation?

a)

Water (H₂O)

b)

Carbon Dioxide (CO₂)

c)

Sunlight

d)

Glucose (C₆H₁₂O₆)

28.

Which element is not equal on both sides of the equation to support the Law of Conservation of Matter?

Ag + 2HCl → AgCl2 + H

a)

H

b)

Cl

c)

Ag

29.

According to the chemical equation above, in an Endothermic Reaction, heat energy is a _______.

a)

Reactant

b)

Released

c)

Product

d)

Not present

30.

When you bake cookies in the oven, what is happening in terms of energy?

a)

an endothermic reaction, absorbing heat from its surroundings

b)

an endothermic reaction, releasing heat from its surroundings

c)

an exothermic reaction, absorbing heat from the surroundings

d)

an exothermic reaction, releasing heat from its surroundings

31.

When calcium chloride is mixed with water, it gives off heat. This observation suggests that ____.

a)

it is an endothermic reaction

b)

the matter doesn’t change

c)

a change in state has occurred

d)

it is an exothermic reaction

32.

Which organelle is the site for energy production in a cell?

a)

Cytoplasm

b)

Chloroplast

c)

Mitochondria

d)

Cell Membrane

33.

Which organelle is responsible for controlling the activities of the cell?

a)

Vacuole

b)

Mitochondria

c)

Nucleus

d)

Cell Wall

34.

Which organelle is much larger in plant cells and is responsible for storing water?

a)

Vacuole

b)

Cell Membrane

c)

Nucleus

d)

Chloroplast

35.

What cell organelle carries out photosynthesis?

a)

Cell Membrane

b)

Mitochondria

c)

Nucleus

d)

Chloroplast

36.

What cell organelle carries out cellular respiration?

a)

Cell Membrane

b)

Mitochondria

c)

Nucleus

d)

Chloroplast

37.

What are the products of photosynthesis?

a)

carbon dioxide & glucose

b)

water & glucose

c)

oxygen & carbon dioxide

d)

glucose & oxygen

38.

What are the products of cellular respiration?

a)

carbon dioxide & water

b)

water & glucose

c)

oxygen & carbon dioxide

d)

glucose & oxygen

39.

Cellular Respiration occurs in what type of cell?

a)

Plant cell

b)

Animal Cell

c)

Plant and animal cells

d)

None of the above

40.

Photosynthesis occurs in what type of cell?

a)

Plant cell

b)

Animal Cell

c)

Plant and animal cells

d)

None of the above

41.

Why is cellular respiration an exothermic reaction?

a)

energy is absorbed

b)

the energy amount does not change

c)

energy is released

d)

energy doesn’t exist

42.

(a)   is an endothermic reaction.