8th Grade Nature of Science FL Review

The variable that is being measured or observed is called the _______________. Hint: this is the variable that is the result or effect

• independent variable

• dependent variable

• control variable

What type of graph is useful for showing groups or counted items?

• line
• bar
• circle

"There are four students wearing red." is an example of

• quantitative data

• qualitative data

Jackie sets up an investigation to find out how many paperclips she can pick up with an electromagnet. She takes a long iron nail, wraps insulated wire around it 40 times, and connects the wire ends to the opposite terminals of a D-cell battery.

Jackie touches the tip of the nail to a pile of 100 paperclips and picks up 15 of them. She tries the investigation again and picks up 15 paperclips. Jackie concludes that her electromagnet can pick up 15 paperclips. What should Jackie do to improve her investigation?

• Jackie should use a regular magnet and not an electromagnet.

• Jackie should use a different type of battery.

• Jackie should do more trials to make sure her results are valid.

• Jackie should begin with more than 100 paperclips.

Qualitative data does not

• Have an answer

• Have a number

• Have a question

• Have data

All models have _______________. Even good models can often be made better.

• replicas

• computer simulations

• limitations

• drawings

The independent variable is the ONE thing you _____.

• change on purpose
• control or keep constant
• measure

Which is the dependent variable in Amelia's experiment?

• the number of bean plants in each group 
• the amount of water given daily to each plant 
• the height of each bean plant 
• the amount of fertilizer given to each group of bean plants

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

In which statement does the word theory mean scientific theory?

• In theory, the experiment will work as planned. 
• She has a theory about why the storm arrived later than predicted. 
• The atomic theory explains that material objects are made up of atoms. 
• The doctor’s prescription for curing a cold is based on his best theory or guess.