Which of the following is an example of a force that requires objects to touch?

a) Magnetic Force keeping paper on a refrigerator

b) Static electricity making an electric spark

c) The friction of a bike tire slowing down due to applying brakes

d) A leaf falling from a tree

What type of force is needed to break a piñata with a bat?

A. contact B. electrical C. gravity D. magnetic

Which statement is part of the Law of Gravity?

A.  When astronauts leave the planet Earth's gravity stops.

B.  An object with a larger mass exerts the same amount of gravitaional pull as an object with a lesser mass.

c.  All objects exert a gravitational pull on another object.

d.  Small objects do not exert any gravitational pull.

When would the gravitational pull of an object b the greatest?

A.  When it is large and it is far away from an object.

B.  When it is large and close to an object

C.  When it is small and close to an object

D.  None of the above; gravitational pull does not change.

What type of force acts on a student sitting in a chair and does not move?

A. unbalanced force

B. balanced force

C. electrical force

D.  non-contact force

Atoms make up 

a.  only non-living things

b.  only living things

c.  both non-living and living things

d  energy

Tissues are a group of _______ that perform a specific function.

a.  organs

b.  organ systems

c.  cells

d.  organisms

Place these in order from lowest to highest level according to the levels of organization of living things.

liver organ

muscle cells

digestive system

human being

muscle tissue

organelle like the nucleus

What are the main molecules that make up cells?

a.  lipids, carbohydrates, proteins and nucleic acids

b.  nitrogen, hydrogen, oxygen, and carbon

c.  iron, niacin, calcium, vitamin D

d.  nuclues, mitochondria, ribosomes, cell membrane

If somone is biking down hill what is the energy conversion that is taking place?

a.  from kinetic to potential

b.  from potential to kinetic

c.  from electrical to kinetic

d.  from balanced to unbalanced

What was John's speed at 80 seconds?

a.  1.14 m/s

b. 0.875 m/s

c. 10 m/s

d. .75 m/s

Which of the following describes the change in energy in a car when it burns gasoline?

A. Electrical potential energy is transformed into kinetic energy.

B. Chemical potential energy is transformed into kinetic energy.

C. Electrical kinetic energy is transformed into potential energy.

D. Chemical kinetic energy is transformed into potential energy.

Which line, A or B, is faster?

a.  Neither one, they are going the same speed

b.  Line A because the slope is less steep.

c.  Line B because the slope is more steep.

d.  Line A because the slope is more steep.

Sinkholes form by the process of _____________ by water reacting with limestone.

a. chemical weathering

b. physical weathering

c. wind weathering

d. percolation weathering

Which landform gets changed most quickly by wind?

a.  rock formations on a mountain

b.  curves in rivers

c.  sands in the dune

d.  rock formations in sea cliffs

When sediment travels through ariver and then dumpitself into a body of ocean, a landform is developed.  What do we call this land form of deposited sand froma river into the ocean?

a. a dune

b. a mountain

c. a sinkhole

d. a delta

How does gravity affect a mountain?

a.  During a heavy rainstorm, sediment can loosen which allows for a landslide to develop.

b.  animals can burrow under rocks and loosen soil to break up the rocks even more

c.  the roots of a plant can expand cracks that are in the rock and weather it even more

d.  acids in water can eat away at the surface of a rock and long periods of time wear the rock away.

How does gravity affect a mountain?

a.  During a heavy rainstorm, sediment can loosen which allows for a landslide to develop.

b.  animals can burrow under rocks and loosen soil to break up the rocks even more

c.  the roots of a plant can expand cracks that are in the rock and weather it even more

d.  acids in water can eat away at the surface of a rock and long periods of time wear the rock away.

What 3 main things do living organisms need to do in order to maintain homeostasis?

a.  eat well, sleep well and work hard

b.  eat a healthy diet, get regular exercise and maintain a healthy weight

c.  get energy to move, get rid of wastes, and reproduce (make more of themselves)

d.  play video games, stay in your pajamas all day, eat as much junk food as you can.

What two main body systems maintain the body's intake of oxygen and spreading it thorughout the body?

a.  the muscular and skeletal

b. the circulatory and respiratory

c.  the digestive and excretory

d. the integumentary and lymphatic

Which two main body systems regulate waste and break down nutrients?

a.  the respiratory and cardiovascular

b.  the integumentary and endocrine

c.  the digestive and the excretory

d. the muscualr and skeletal

Which two main body systems interract for someone to stand up and run?

a.  endocrine and nervous

b.  digestive and circulatory

c.  muscular and skeletal

Which main two human body systems interract for someone to feel pain and to flee the dangerous situation?

a.  endocrine and nervous

b.  digestive and circulatory

c.  circulatory and respiratory