Crit. B

Get ready for crit. B
Variables & Method

Review on variables

Multiple Choice

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 ...

• The type of plant
• The amount of sunlight
• The type of music
• The type of liquid

Multiple Choice

If I ride my bike to school instead of walking, then I will get to school faster. What is the dependent variable?

• True
• How fast you get to school
• Riding a bike or walking
• False

Multiple Choice

If you increase the amount of spinach you eat, then you will increase the iron in your blood. 
What's the dependent variable?

• increase the amount of iron in your blood
• spinach you eat

Multiple Choice

Dependent variable means

• the scientist controls what to test
• educated guess
• ask a question
• what is being measured

Multiple Choice

What is a factor that the experimenter has full control over and changes to see what happens?

• Dependent Variable
• Independent Variable
• Control group 
• Hypothesis

​

















Controlled variables



. Controlled variables are the variables that remain constant (=can not change) during the experiment.

They must be relevant:
they have to be chosen because it is obvious that they can have an impact on the dependent variable.

For each control variable, it will be clearly explain how and why they can impact the measurement of the dependent variable.

Multiple Choice

These are variables that are kept the same throughout all experimental groups to prevent error in the experiment.

• Independent Variable

• Dependent Variable

• Controlled Variable

• Varying Variable

Hypothesis

Multiple Choice

A students was doing an experiment using the scientific method. Every three days the student plans to count the green leaves. Which would be a good hypothesis for this experiment?

• If plants are placed in direct sunlight, then they will grow more green leaves.

• If plants are places in bright light, then they will grow more green leaves than in dim light.

• If plants are place in clay pots, then they will grow more green leaves than plastic pots.

• If plants are in warmer temperatures, then they will grow more green leaves.

Method

Open Ended

What is a good method?

Tips for writing a method

Include 5 changes of the IV

Logical

Include 3 trials

Include necessary steps to check on your CV

ALWAYS start with a verb

Number the steps

​Ask for the exercises

Work on the methods, try to find out what is wrong and improve them!

Can you do it?

Reorder

Reorder the following steps of a method to make it logical.

This method describe how to enter a class when your late.

• Knock on the door.

• Wait to be invited in.

• Say hello and give a reason for being a late.

• Go to your seat.

• Start working.

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5