Mind Spark Round 1

1. A student uses a toy car and ramp to investigate how surface affects the speed of a

rolling object. What should the student intentionally change when doing this

experiment? (Choose the best answer)

• A. The color of the toy car

• B. The distance the toy car travels

• C. The material on which the toy car rolls

• D. The weight of the toy car

2. Which two tools should be used together to measure speed? (Choose all that apply)

• A. Balance and spring scale

• B. Clock and a measuring tape

• C. Meter stick and stopwatch

• D. Ruler and graduated cylinder

·       Which of these is the best way to measure a force?

• A.     Using a force meter

• B.     Using a ruler

• C.    Using a thermometer

·       What is the unit of force called?

• The Newton, n

• The Newton, N

• The neutron, N

·       Why does an astronaut weigh less on the Moon than on the Earth?

• The Moon has no atmosphere.

• The Moon has no gravity.

• The force of gravity is weaker on the surface of the Moon than on the surface of the Earth.

·       What is the pressure exerted by a man standing on one leg?

• A.    Half of the pressure he exerts when standing on two legs.

• B.    The same pressure as he exerts when standing on two legs.

• C.   Twice the pressure he exerts when standing on two legs.

·       Gravity is an example of what?

• A.    A contact force

• B.    An un-contact force

• C.   A non-contact force

·       The main function of the circulatory system is 

• A. To give the body structure and support

• B. Excrete waste

• C. transport blood, nutrients, and gases throughout the body

• D. to transport messages from the body to the brain

·       The human heart is an organ that pumps blood throughout the body supplying oxygen, nutrients, blood, and hormones to and from the tissues removing _________ ___________ and other wastes.

• A. hydrogen dioxide

• B. carbon moxoide

• C. water molecules

• D. carbon dioxide

·       The heart is made up of _________ chambers

 

 

• A. one 

• B. two

• C. three

• D. four