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Block 4 - Experimental Design and Scientific Method

Total questions: 20

Worksheet time: 22mins

Name
Class
Date
1.

You are testing how the amount you water a plant affects its growth. What would be the INDEPENDENT VARIABLE in this experiment.

a)

They type of pot you put the plants in.

b)

The amount you water each plant.

c)

The amount of sunlight the plants get.

d)

The amount the plant grows.

2.

A scientist is testing which flavor of ice cream melts the fastest. What would his controlled variables be? (choose ALL that apply)

a)

The flavor of ice cream

b)

the kind of cone the ice creams are in

c)

the place in the room where the ice cream is

d)

the size of the scoop

e)

the time it takes to melt

3.

Sadie is testing how the age of a seed affects how fast plants grow. Look at the picture to see if you can figure out what makes her experiment unfair. Mark all that apply.

a)

She used different types of seeds/plants.

b)

The plants are in different kinds of pots.

c)

She did not plant very many plants.

d)

Seed age might not make a difference.

4.

What is the DEPENDENT variable (effect that is measured) in this experiment?

"Do tall people jump further than short people?"

a)

height of the person

b)

weight of the person

c)

how fast the person runs

d)

how far the person jumps

5.

The variable that is being tested, counted, or measured and how it reacts to the independent variable is known as:

a)

Independent Variable

b)

Controlled Variable

c)

Dependent Variable

6.

A student wants to test the hypothesis of "If salt is added to water then the boiling point of water will decrease (go down)." What is the independent variable?

a)

Whether salt is added or not

b)

Boiling Point

c)

Amount of water

7.
When experimenting with the growth of a plant, a scientist uses three (of the same type of) plants, two different fertilizers, equal light, and equal water. What type of variable is the fertilizer?
a)
Dependent
b)
Independent
c)
Control
d)
Compound
8.
Research Question: Does the type of gasoline put in a car effect how fast the car can drive. What is the independent variable?
a)
Type of gasoline
b)
which car the gas is put into
c)
how fast the car can drive
d)
how much gas is put into the car
9.
Ms. S set up an experiment to see how the mass of a ball affects the distance it rolls off a ramp. What is the dependent variable?
a)
Distance traveled by the ball
b)
Height of the ramp
c)
Mass of the ball
d)
Where the experiment took place.
10.
The independent variable is the ONE thing you _____.
a)
change
b)
keep the same
c)
experiment with
d)
investigate
11.
What is the DEPENDENT variable (effect) is this experiment?
"Does eating breakfast improve test score?" 
a)
eating breakfast or not
b)
the grade you got on the test
c)
what time you get up in the morning
d)
how tasty the breakfast is
12.
A study was done to see if different tire treads affect the braking distance of a car.
What is the dependent variable?
a)
Tire treads
b)
Braking distance
c)
Road conditions
d)
Model of car
13.
The higher the temperature in an oven, the faster a cake will bake.
What is the independent variable?
a)
Cake flavor
b)
Temperature
c)
Time
d)
Type of oven
14.
An investigation found that more potatoes would be produced on a farm if the soil was fertilized more.
What is a constant in this experiment?
a)
Number of potatoes
b)
Amount of fertilizer
c)
Science
d)
The location of the farm
15.
The more times that an experiment is repeated and the same results obtained, the more likely the results are _________. 
a)
better
b)
observed
c)
valid
d)
used
16.
The summary at the end of an experiment that explains the results. 
a)
conclusion
b)
procedures
c)
materials
d)
hypothesis
17.
Why do scientists use the scientific method?
a)
To make sure they get credit for their discoveries.
b)
To make sure their results are valid and can be performed by other scientists.
c)
So that other scientist don't get mad at them
d)
They don't know how do experiments
18.
Scientists have MANY trials so their results are 
a)
countable
b)
graphable
c)
reliable
d)
hard to understand
19.
When a another scientist does someone's experiment to see if the results are valid?
a)
repetition
b)
replication
c)
experimental method
d)
controlled variable
20.
Scientists frequently repeat the experiments of others scientists. Why is this important in science?
a)
Scientists often ask each other for help in performing experiments.
b)
Replication of experiments helps to confirm and verify results.
c)
Scientists frequently perform other scientists’ experiments in order to practice their technique.
d)
Repeating experiments is an effective way to make sure a laboratory is in optimal condition.

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