Hypothesis Refiew

What is a hypothesis in science?

• A random guess

• A testable answer to a scientific question

• A scientific fact

• A list of materials

What phrase is commonly used to structure a hypothesis?

• "Why does this happen?"

• "What if this occurs?"

• "If [I do] ___, then [this] ___ will happen, because ___."

• "Since I already know this, that must be true."

Why is it important for a hypothesis to be testable?

• So scientists can prove it's correct without testing

• So scientists can conduct experiments to see if it's supported

• So it sounds more interesting

• To avoid conducting any experiments

Which of the following is a good hypothesis?

• If I read more books, then I will know more facts, because reading teaches new things.

• I think it will rain tomorrow.

• Eating candy is fun.

• Milk tastes good.

Fill in the blank: A hypothesis is sometimes called an "__________."

• Educated guess

• Theory

• Assumption

• Inference

Which part of this hypothesis explains the reasoning? "If dry bread and moist bread are left in bags for two weeks, then the moist bread will grow mold more quickly, because mold needs water to survive."

• If dry bread and moist bread are left in bags

• Then the moist bread will grow mold more quickly

• Because mold needs water to survive

• Dry bread doesn't matter

Why is research important before forming a hypothesis?

• It helps avoid mistakes during experiments

• It gives scientists a better understanding to form a more accurate hypothesis

• It makes experiments unnecessary

• It saves time from asking questions

Which of the following could be a testable hypothesis about plants?

• Plants look pretty in my garden

• If plants are given more sunlight, then they will grow taller, because sunlight provides energy for growth

• Flowers are better than vegetables

• People like roses more than daisies

In Adam's experiment about catching more fish in colder lakes, what would his hypothesis look like?

• Fish are in the lake because it's pretty.

• If I fish in a lake cooler than 55 degrees, then I will catch more fish, because cooler water holds more oxygen.

• Warm lakes are better.

• Fish don't care about water temperature.

What should you do if your experiment does not support your hypothesis?

• Ignore the results

• Change your data to match the hypothesis

• Rethink the hypothesis and conduct new experiments

• Stop doing science forever