Create a hypothesis

What is a correct hypothesis for this testable question?

Testable question: Does changing the amount of water affect the growth of plants?

Materials:

2 sunflower plants

2 pots with same soil

10oz water daily

Rock music and headphones - 1 plant

1 plant no music or headphones

ruler

• If we use rock music then the plant will decrease because plants shrink.

• If we use rock music then the plant will grow more in size.

• If we use rock music then the plant will grow more in size because rock music stimulates the plant to grow more.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What is a correct hypothesis for this testable question?

Testable question: Does changing type of surface effect how far a ball will roll?

Materials:

2 rubber balls

concrete surface

dirt surface

ruler

• If we roll the ball on the dirt then the plant will roll longer because it can roll longer on a rough surface.

• If we roll the ball on the dirt then the plant will roll shorter because it can roll longer.

• If we roll the ball on the dirt then the plant will roll shorter because it the bumps of the dirt surface make it harder for the ball the roll farther away.

Tags

NGSS.MS-PS2-2

What is a correct hypothesis for this testable question?

Testable question: Does changing the height of a ramp affect the distance a ball rolls?

Materials:

2 rubber balls

1 ramp (5 inches tall)

1 ramp (10 inches tall)

ruler/measuring take

• If we roll the ball on the dirt then the plant will roll shorter because it the bumps of the dirt surface make it harder for the ball the roll farther away.

• If we roll the ball on the short ramp then the ball will roll a shorter distance because it will speed up faster down a longer ramp, making it go farther compared to the shorter ramp.

• If we roll the ball on the short ramp then the ball will roll a farther distance.

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

What is a correct hypothesis for this testable question?

Testable question: Does changing the type of material (cotton, plastic, rubber) affect the amount of water it can absorb?

Materials:

1 4-inch piece of cotton

1 4-inch piece of plastic

1 4-inch piece of rubber

dropper

water

beaker

• If I use the rubber then the water will not be absorbed.

• If I use the cotton then the water will be absorbed.

• If I use the cotton then the water will be absorbed because cotton is known to be an absorbent material, unlike rubber and plastic.

Tags

NGSS.MS-PS1-2

What is a correct hypothesis for this testable question?

Testable question: Does changing the brand of bubble gum affect the size of a bubble blown?

Materials:

3 piece hubba bubba

3 pieces trident

3 pieces of bazooka

ruler

• If I use hubba bubba, the bubble will be smaller because.

• If I use trident then the bubble will be the same because I think it has to be the same.

• If we use hubba bubba, then the bubble will be bigger because the hubba bubba gum is made of materials that make it an easier gum to blow bigger bubbles with.

Write a hypothesis for this testable question: Does changing the ratio of salt added to an ice cream maker effect the amount of time it takes to make ice cream?

Hypothesis format:

If I ...

Then ...

Because...

Materials:

1 box of rock salt

1 tablespoon

1/4 cup

2 packets ice cream mix

2 ice cream machines (same brand)

1 timer/stopwatch

Use the checklist to check your hypothesis. Submit your work after checking your response.

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

What is a hypothesis?

• the thing changed on purpose in the experiment

• an explanation about what you observed

• using your 5 senses to gather data

• an educated guess about the outcome of an experiment

What two words should be in your hypothesis?

• I think

• If ...then...

• It will

• No idea

When is a hypothesis written?

• before you decide on a question

• after the experiment

• before the experiment

• after the conclusion

The independent variable is

• the part the scientist measures

• the part the scientist changes or is testing

• a letter