0
Upcoming SlideShare
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Standard text messaging rates apply

# Fair tests

1,378

Published on

0 Likes
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
• Be the first to comment

• Be the first to like this

Views
Total Views
1,378
On Slideshare
0
From Embeds
0
Number of Embeds
1
Actions
Shares
0
61
0
Likes
0
Embeds 0
No embeds

No notes for slide

### Transcript

• 1. Fair Tests Types of Variables
• 2. Variables arethings that vary and change
• 3. VariablesIn any experiment there are 3 variables: An independent (changed) variable A dependent (measured) variable Some control variablesLet’s look at each type…
• 4. Independent Variable This is the thing you decide to changeeg. Investigating how plants grow when they are given different amounts of water You change the amount of water you give the plant. So, amount of water is the independent variable.
• 5. Dependent Variable This is the thing that changes as a result. This is the thing you measureeg. Investigating how plants grow when they are given different amounts of water You measure how much the plant grows. So, amount of growth is the dependent variable.
• 6. Control Variables These are all the things that must not change to make it a fair test. They must be kept the same. You need to keep the plants in the same place so that they get the same amount of sunlight or shade. You need to grow the plants in the same type of pot, that are the same size. The plants need to have the same type and same amount of potting mix. These are the control variables.
• 7. Summary The independent variable is changed.  Amount of water The dependent variable is measured.  Growth of plant. The control variables are kept the same.  Amount of sunlight or shade.  Type of pot.  Size of pot.  Type of potting mix, etc.