Science

A

1

Any stable environment where living and nonliving things interact, and the materials are used over and over again.

ecosystem

2

A body of water that forms when freshwater from rivers and streams flows into the ocean and mixes with the seawater.

estuary

3

These are disease-causing microorganisms such as viruses, bacteria, and parasites.

Pathogens

4

the area between high and low tides

Intertidal zone

5

A place or object used to determine if an object is in motion.

reference points

B

1

a push or a pull between two charged objects 

electric force

2

 Continuous change in position of a body with respect to a point of reference.

Motion

3

Include only magnitude like distance and speed.

Scalar quantities

4

Refers to how much ground an object has covered due to its motion.

Distance

5

The rate at which an object changes position.

speed

C

1

Measures the change in speed in a given direction.

Velocity

2

Defined as the rate of change of velocity per unit time.

Acceleration

3

Law of motion states that an object at rest remains at rest and an object in motion remains in motion with a constant speed along a straight path unless an outside force acts on it.

Law of Inertia

4

Another resistance force that acts on the ball.

Gravity

5

This law states that for every action there is an equal and opposite reaction.

Law of Interaction or Action and Reaction

D

1

This law states that a moving object accelerates because of a force acting on it.  

formula: a = f/m.

Law of Acceleration

2

Materials that allow heat and electricity to flow through them.
 

Conductors

3

materials that are poor conductors  

Insulators

4

Glass or water, transmit most light without it being scattered or absorbed. They still reflect some light,

Transparent materials

5

Wax paper and frosted glass, transmit less light than transparent materials. Some light is scattered or absorbed and you cannot see them clearly.

Translucent materials

E

1

Cardboard or wood scatter, absorb, or reflect most of the light and transmit almost no light. Thus, you cannot see through them.

Opaque materials

2

Happens when light reaches an object and bounces or is reflected partially or totally by the object.

 Reflection 

3

Happens when light goes through a surface or object. It may also be direct, diffused, or selective.

Transmission

4

Occurs when the incoming light bounces off an object in many different directions. 

Scattering

5

A form of energy associated with the flow of electrons while magnetism is the visible forces of attraction or repulsion between substances.

Electricity