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Science review

Total questions: 50

Worksheet time: 42mins

Name
Class
Date
1.

When air is heated, its volume ____________.

a)

increases

b)

decreases

c)

remains the same

2.

When air is heated, its density ___________.

a)

increases

b)

decreases

c)

remains the same

3.

Convection can take place in ____________.

a)

solids only.

b)

liquids only.

c)

liguids and gases only.

d)

solids, liquids and gases.

4.

Your heart is an involuntary muscle that is always working.

a)

True

b)

False

5.

Electricity cause your muscles to contract.

a)

True

b)

False

6.

Which of the following is true about your heart?

a)

Your heart may stop beating from time to time.

b)

You have to think in order to keep your heart beating.

c)

Your heart pushes blood through your body.

d)

All of the above

7.

How are arteries and veins different?

a)

One is bigger than the other.

b)

The arteries carry more blood than the veins.

c)

The arteries carry blood away from the heart while veins carry blood to the heart.

d)

The veins carry blood away from the heart while arteries carry blood to the heart.

8.
As waste moves through the digestive system, the ______ absorbs water before storing waste in the rectum.
a)
Small intestine
b)
Stomach
c)
Esophagus
d)
Large intestine
9.
Where does digestion begin?
a)
Mouth
b)
Esophagus
c)
Stomach
d)
Small Intestine
10.
The main purpose of the ____________ system is to break food particles into pieces that can be used.
a)
circulatory
b)
respiratory
c)
digestive
d)
skeletal
11.

Which of these digestive system organs does your food NOT travel through?

a)

Stomach

b)

Esophagus

c)

Small Intestine

d)

Liver

12.
Calculate the net force of the object in the image shown.
a)
20N
b)
35N
c)
5N
d)
25N
13.

A ____________ is a push or a pull on an object.

a)

friction

b)

force

c)

magnet

d)

gravity

14.
What will cause an object to move?
a)
Applied forces
b)
Balanced forces
c)
Unbalanced forces
15.
What is the SI unit used to measure force? 
a)
pounds 
b)
grams 
c)
newtons 
d)
friction
16.
The amount of matter in an object is 
a)
pressure
b)
weight
c)
mass
d)
force
17.
A person would weigh less on on the Moon than on the Earth because . . .
a)
Moon has more mass, and therefore more gravity
b)
Moon has less mass, and therefore more gravity
c)
Moon has more mass, and therefore less gravity
d)
Moon has less mass and therefore less gravity
18.
The sun shines down on this family as the play on the beach.
a)
conduction
b)
convection
c)
radiation
19.
Molecules in cold things move more _________
than in hot things.
a)
quickly
b)
slowly
c)
happily
d)
merrily
20.
What is the definition of CONDUCTION?
a)
When heat is transferred from objects like rays of light or electromagnetically.
b)
a  hot liquid or air that  expands, becomes less dense, and rises or becomes more dense, and sinks.
c)
When heat transfers from objects that are touching.
d)
When heat transfers through the heater or AC in your house.
21.
Heat transfers from an area of ____temperature to an area of ___ temperature.
a)
high to low
b)
low to high
c)
high to high
d)
It can travel high to low and low to high. 
22.

What do Zoologists study?

a)

Animals

b)

Plants

c)

weather

d)

Cells

23.

What do Paleontologists study?

a)

Dinosaurs

b)

Mammals

c)

Rocks

d)

Genes

24.

What do Biologist study?

a)

Life

b)

animals

c)

rocks

d)

dinosaurs

25.

What do Virologists study?

a)

Viruses

b)

Plants

c)

Space

d)

Heredity

26.

What do Astronomists study?

a)

Space

b)

Plants

c)

Rocks

27.

All objects have inertia

a)

True

b)

False

28.

Inertia depends on ______

a)

Velocity

b)

Speed

c)

Distance

d)

Mass

29.

Inertia is the tendency of an object to resist a change in its ___________.

a)

temperature

b)

shape

c)

size

d)

motion

30.

Velocity is speed with __________________________.

a)

a unicycle helmet

b)

direction

c)

fight

31.
This type of force resist motion between two surfaces that are pressed together
a)
contact
b)
gravity
c)
friction
32.

What is the acid called that helps to break down food in the stomach?

a)

hydrochloric acid

b)

gasoline

c)

motor ol

d)

carbonic acid

33.
A series of steps used by scientists to solve a problem or answer a question. 
a)
scientific method
b)
recipe
c)
data collection
d)
metric system
34.
Testing a hypothesis often involves a(n):
a)
answer
b)
experiment
c)
problem
d)
safety check
35.
The summary at the end of an experiment that explains the results. 
a)
conclusion
b)
procedures
c)
materials
d)
responding variable
36.
If you increase the amount of spinach you eat, then you will increase the iron in your blood. 
What's the dependent variable?
a)
increase the amount of iron in your blood
b)
spinach you eat
37.
If I study for my scientific method test, then I will have a better test score. What is the dependent variable?
a)
Scientific Method
b)
Studying
c)
Independent variable
d)
Test score
38.
Explaining the color of a chemical would be what kind of observation?
a)
Qualitative 
b)
Quanitative
39.
What is the part of the experiment that is left alone or “natural", and is used to compare back to?
a)
Independent Variable
b)
Dependent Variable
c)
Control Group
d)
Experimental Group 
40.
You will want your experiment to have ____ independent variable(s) in it for the experiment to be valid.
a)
1
b)
2
c)
3
d)
4
41.

What human body system is responsible for allowing you to move like walking, running and jumping?

a)

Nervous System

b)

Digestive System

c)

Muscular System

d)

Circulatory System

42.

What human body system is responsible for circulating oxygen, carbon dioxide, nutrients and blood around the body?

a)

Cardiovascular System

b)

Respiratory System

c)

Digestive System

d)

Nervous System

43.

What human body system is responsible for helping us breathe in oxygen and exhale carbon dioxide?

a)

Nervous System

b)

Respiratory System

c)

Circulatory System

d)

Urinary System

44.

What human body system is responsible for communicating with the whole body by sending electrical signals so the body knows what to do?

a)

Muscular System

b)

Digestive System

c)

Nervous System

d)

Circulatory System

45.

What organs do you have all around your body that help you use your reflexes?

a)

Brain

b)

Nerves

c)

Skin

d)

Arteries

46.

What organ is made up of cardiac muscle tissue and is vital to circulate materials around your body?

a)

Stomach

b)

Large Intestine

c)

Heart

d)

Biceps

47.

What organ directs and controls all activities in our body? It is considered the most important organ in our body!

a)

Heart

b)

Lungs

c)

Brain

d)

Liver

48.
Which one of the following systems DO NOT absorb nutrients or get rid of wastes?
a)
Respiratory System
b)
Digestive System
c)
Nervous System
d)
Circulatory System
49.

Which of the following is a component of the circulatory system?

a)

heart

b)

blood vessels

c)

blood

d)

all answers

50.
Organs that work together form 
a)
connective tissues. 
b)
tissue systems. 
c)
organ systems. 
d)
All Answers

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