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7th Grade Science

Total questions: 46

Worksheet time: 26mins

Name
Class
Date
1.
all matter is made of what 
a)
energy 
b)
atoms 
c)
electrons 
d)
compounds 
2.
The positive particles of an atom are 
a)
electrons 
b)
positrons 
c)
neutrons 
d)
protons 
3.
the central region of an atom where its neutrons and protons are is its 
a)
nucleus 
b)
electron cloud
c)
core 
d)
center 
4.
True or False? Neutrons have a negative charge
a)
True
b)
False
5.
What does the 1.00794 stand for?
a)
Hydrogen
b)
atomic number
c)
atomic mass
d)
atomic explosion
6.
True or False: Your hypothesis can never be wrong.
a)
True
b)
False
7.
If plants are exposed to sunlight, then they will grow taller.
What part of the scientific method is this an example of?
a)
Procedure
b)
Hypothesis
c)
Question
d)
Results
8.
What is a hypothesis?
a)
an educated guess stating what you believe will be the result of your experiement
b)
a random guess
c)
a statement of the outcome of your experiment
d)
step by step directions for your experiment
9.
The independent variable is the ONE thing you _____.
a)
change on purpose
b)
control or keep constant
c)
measure
10.
This variable in an experiment is the one being deliberately changed by the scientist. 
a)
dependent variable
b)
independent variable
c)
data
d)
control group
11.
Should experiments be repeated over and over to see if the results are the same each time?
a)
yes
b)
no
12.
A __________ includes all living and non-living things in an environment. 
a)
population
b)
niche
c)
abitotic
d)
ecosystem
13.
_______ are consumers that eat only meat.
a)
Herbivore
b)
Omnivore
c)
Carnivore
14.
Which organism make their own food through the process of photosynthesis? 
a)
decomposer
b)
consumer
c)
herbivore
d)
producer 
15.
Which describes a decomposer?
a)
an organism that eats only plants
b)
an organism that makes its own food
c)
an organism that breaks down dead matter
d)
an organism that recieves energy from the sun
16.
What are interconnected food chains called?
a)
consumers
b)
predators
c)
food web
17.
How are organisms linked in an ecosystem?
a)
y their physical adaptations 
b)
By what they eat
c)
By where they live or habitat
d)
By their size
18.
Which of the following does not destroy habitats?
a)
building homes
b)
pollution
c)
nature reserves
d)
hunting and trading
19.
Who can help save endangered species?
a)
environmentalist
b)
you
c)
scientists
d)
all of the above!
20.
Which of the following are ways humans can cause an animal to become extinct?
a)
Over Hunting
b)
Deforestation 
c)
Pollution 
d)
All of the above 
21.
CHLORINE
a)
C
b)
Ca
c)
Cl
d)
Cu
22.
MAGNESIUM
a)
M
b)
Mg
c)
Ma
d)
Mn
23.

Energy and matter are cycled in an ecosystem NOT destroyed.

a)

True

b)

False

24.

Bears are an example of a secondary consumer because they eat PLANTS AND FISH (meat)

a)

True

b)

False

25.

____________ is the interaction between species when they fight over food and resources

a)

Predation

b)

Mutualism

c)

Competition

d)

None of these answers

26.

____________ is the interaction between species where BOTH species are HELPED

a)

Competition

b)

Mutualism

c)

Predation

d)

None of the answers

27.

What are two things EVERY living thing needs to survive?

a)

Air, Water

b)

Water, Shelter

c)

Shelter, Food

d)

Fortnite, Wifi

28.

What did Ms. Higgins do for a sport in college?

a)

Lacrosse

b)

Dance

c)

Soccer

d)

Napping

29.

Atoms combine to make ________________

a)

Compounds

b)

Molecules

c)

Less atoms

30.

A polyatomic molecule has LESS than 2 atoms (ex. CO2)

a)

True

b)

False

31.

A diatomic molecule has EXACTLY 2 atoms. (ex. O2)

a)

True

b)

False

32.

The independent variable in the experiment is _____________.

a)

What I change

b)

What stays the same

c)

What depends on what I change

33.

How many oxygen atoms are in the molecule H2O?

a)

3

b)

2

c)

1

d)

0

34.

A change in SHAPE or COLOR is an example of ______________.

a)

A chemical change

b)

A physical change

c)

A mathematical change

35.

An EXOTHERMIC reaction ________ _________ heat.

a)

Has no

b)

Gives off

c)

Takes in

36.

An ENDOTHERMIC reaction takes in heat

a)

True

b)

False

37.

Rusting is when iron and oxygen combine to form a new substance (rust). This is an example of a CHEMICAL change.

a)

True

b)

False

38.

______ ______ is an amazing scientist.

a)

Nick Uhas

b)

Bill Nye

c)

You

d)

All of the above

39.

Ms. Higgins' dog is named

a)

Fluffy

b)

Leo

c)

Munchkin

d)

Boo

40.

Water freezing outside is a _________ change.

a)

Chemical

b)

Emotional

c)

Physical

d)

Mental

41.

An example of low resources is a _________.

a)

Wetland

b)

Coral Reef Ecosystem

c)

Flood

d)

Drought

42.

_____________ is a productive ecosystem with high resources.

a)

Desert

b)

Wetland

c)

Arctic

d)

Outer Space

43.

IntERspecific competition is when two DIFFERENT species compete for resources.

a)

True

b)

False

44.

What is Ms. Higgins' middle name?

a)

None

b)

Belle

c)

Marie

d)

Anne

45.

If Ms. Higgins were an animal she would be a _________.

a)

Dolphin

b)

Dog

c)

Dragonfly

d)

Dinosaur

46.

There are ______ bones in the human body.

a)

110

b)

2002

c)

206

d)

32,000

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