1. Hypothesis
If…then…because

2. Hypothesis
What is a hypothesis?

3. When writing a hypothesis…
Your hypothesis should be in “If…then…because…” format.
After “If” state what you are doing in the experiment
After “then” state what you think will happen in the experiment
After “because” state why you think that will happen.

4. Example
Question:
Which seeds germinate quicker, carrot seeds or tomato seeds?
Hypothesis: If I plant carrot seeds and tomato seeds in soil, then tomato seeds will germinate faster because they grow into bigger plants.

5. Now try these:
Which bread molds quickest: sourdough bread, whole wheat bread, or enriched white bread?
Which type of dog food does Pebbles like best: dry food or moist food?

6. Possible Answers
Which bread molds quickest: sourdough bread, whole wheat bread, or enriched white bread?
Hypothesis: If I place sourdough bread, whole wheat bread, and enriched white bread in a moist plastic bag, then the whole wheat bread will mold the quickest because it has the least preservatives.

7. Possible answer
Which type of dog food does Pebbles like best: dry food or moist food?
If I give Pebbles a choice of dry food or moist food then he will eat the moist food first because it is easier for her to swallow.