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Experimental Design

Total questions: 18

Worksheet time: 16mins

Name
Class
Date
1.
An educated guess that has not been tested. 
a)
law
b)
theory
c)
hypothesis
d)
fact
2.
How many variables should you change in an experiment?
a)
none
b)
1
c)
2 or more
d)
depends on the type of experiment
3.
The variable in an experiment deliberately changed by the scientist. The variable being tested.
a)
dependent variable
b)
independent variable
c)
data
d)
control group
4.
If you were testing how well different dish soaps cleaned grease, the independent variable would be the:
a)
dish type
b)
amount of grease
c)
dish soap type
d)
grease type
5.
The variable that depends on changes to the independent variable. 
a)
control group
b)
dependent variable
c)
experimental variable
d)
independent variable
6.
A factor in an experiment that stays the same.
a)
control group
b)
constant
c)
dependent variable
d)
experimental group
7.
Three baseball players investigate to see who can throw a baseball the farthest. They mark off an area on the playground for their investigation. Which should they keep constant?
a)
height of the players
b)
color of the balls thrown
c)
order in which the players throw
d)
spot from which the players throw
8.

Maya designed an experiment to answer the following question: How does the amount of water given to a lima

bean seed affect how tall it grows?

In this experiment, what variable should Maya CHANGE?

a)

the amount of water

b)

the kind of plant

c)

the type of soil

d)

the amount of sunlight it gets

9.
Three baseball players investigate to see who can throw a baseball the farthest. They mark off an area on the playground for their investigation. Which should they keep constant?
a)
height of the players
b)
color of the balls thrown
c)
order in which the players throw
d)
spot from which the players throw
10.

Cindy wanted to find out how the amount of sunlight affects the growth of plants. She placed a tomato plant in 6 identical 10-inch pots with the same amount and type of potting soil. She watered them ¼ cup each day. 3 plants were placed under a cardboard box and 3 plants were placed in the sunlight. She measured the growth of the plant each week for three weeks.

What is the dependent variable?

a)

Using the same type of plant

b)

Each plant was placed in a 10 inch pot

c)

The growth of the plant

d)

3 plants in the sunlight and 3 plants under a box

11.
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...
a)
The type of plant
b)
The amount of sunlight
c)
The type of music
d)
The type of liquid
12.

Using the picture, identify the control group.

a)

Trial 1

b)

Trial 2

c)

Trial 3

13.
Which of these is not an observation.
a)

There are footprints.

b)

The person was dizzy.

c)

The footprints are black.

d)

There are dots.

14.

Which of these is not an observation?

a)

2 sets of foot prints.

b)

They ended up in the same spot.

c)

One animal ate the other.

d)

The prints are black

15.

If differing lengths of elodea are used in the experiment...

a)

The amount of chloroplasts available to photosynthesise will change

b)

The speed at which the plant undergoes cellular respiration will be affected

c)

The controlled variables will stay the same and the results will be considered accurate

d)

There is no effect on the results

16.

Safety googles

a)

Are worn to protect my beautiful, beautiful eyes

b)

Can be worn on top of my head because they are totally still effective there

c)

Are for nerds

17.

What's wrong here? Select all the correct options

a)

Her hair is not tied up well enough

b)

Do gloves not exist in this world?

c)

Goggles are not being worn

d)

Lab coat needs to be buttoned up

18.

What's wrong in this picture? Select all the correct options

a)

Where are his gloves??

b)

Readings should be taken at eye level on a flat surface

c)

Nothing at all. This is good science at work here

d)

His hair needs to be tied back

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