Science Lessons

What is being kept constant?

• amount of fertilizer

• amount of water

• height

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

What is the outcome (DEPENDENT) variable?

• plant height

• time in days

• sunflower

• daisy

Tags

NGSS.MS-LS1-5

A prevailing theory about heredity is challenged by newly discovered information from a few experiments. As a result, what might happen to the scientific knowledge about heredity?

• A new theory will immediately be established.

• All that is known about heredity will be erased

• Nothing because scientific knowledge cannot change once it is established.

• Scientific knowledge may change and grow over time.

A constant is:

• something that is changed on purpose

• something that scientists do not yet understand

• something that stays the same

• something that changes because of something else

Mr. McNeice wanted to know if different types of music affected people's heart rates, so he played different music and checked their pulses.  What is the dependent variable?

• type of music

• heart rate

• how long they listend to music

• Mr. McNeice

Which question can best be investigated by a scientist?

• Should I buy a red shirt or a green shirt?

• Does chocolate milk or plain milk taste better?

• Does a plant need sunlight to grow?

• Which feels softer, cat fur or dog fur?

Tags

NGSS.MS-LS1-5

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Why should an experiment be repeated?

• to form a hypothesis

• to reduce the chance of error

• to change controls

• to identify the problem

Tags

NGSS.MS-PS3-4

Why do we want to test one variable at a time?

• Because it is hard to setup a data table with more

• To know what is causing the changes. This helps us understand cause and effect.

• It is what has always been done

Tags

NGSS.MS-PS2-2

What type of circuit is shown in the diagram?

• series circuit

• parallel circuit

• open circuit

The circled part of the simple electric circuit is called________________.

• electric wire

• energy source

• electrical appliance