28)
a scientific theory is an explanation based on observations and experiments.

true
false

29) what is a scientific law?

30)
experiments provide data which become a major part of the foundation for scientific disciplines.

true
false

31) imagine you are about to purchase a new refrigerator. there are two models that you are considering. each refrigerator is required to have an energy efficiency sticker on the door so that the buyer can be aware of the cost of running the refrigerator. refrigerator (a) costs $10.00 a month to operate and $700.00 to buy. refrigerator (b) costs $15.00 a month to run and $600.00 to buy. decide which refrigerator you would purchase, (a or b) and indicate in the answer box why it would be better for the environment.

32)
patterns of stars in the sky are

a.) observations
b.) constellations

33) ancient greeks and romans believed that patterns of stars in the sky and
a.) unfamiliar objects and clouds
b.) faces and rock shapes
c.) mythological characters and animals

the sun in our solar system is a

a.) cloud
b.) star
c.) constellation

the considered to be the closest star.

a.) neptune
b.) sun
c.) moon

36)
how long does it take for light from the sun to travel to the earth?

a.) eight minutes
b.) five minutes
c.) four years

28. A scientific theory explains an aspect of the natural world and can be tested repeatedly using the scientific method or experiments. This means that the explanations or content of a scientific theory is based on evidence gained through observation or experimentation. 

The answer is True.

29. Scientific law is a statement that describes a a phenomenon that has been observed in repeated experiments. These statements are verified through the scientific method. Laws do not change; rather, they are applied to expand or broaden certain aspects.

30. Experiments are done to support, refute or validate existing theories. They show cause and effect insight through demonstration. These theories then may bring about laws in the scientific field. 

The answer is then True.

31. I would get the Refrigerator A. The cost of running Refrigerator A is $10.00 a month, while B is $15.00 a month. This means the energy consumption is less with refrigerator A. Although B is cheaper, the energy consumption is much higher. In the long run, refrigerator A, would be a better investment.

32. Patterns of stars in the sky are called constellations. Constellations are a group of stars that form a recognizable pattern that is traditionally named after the mythological figure or whatever thing, animal or person that resembles the pattern.

The answer is B.

33.  Ancient Greeks and Romans believed that the patterns in the sky represented mythological characters and animals. Examples of such would be Aries, Cancer, Capricornus, and the Big dipper. Romans mythology also depicts other celestial bodies as their gods, like mercury after the messenger god; Venus, the goddes of love and beauty. 

The answer is C.

34. The sun in the solar system is a star. In fact, a star is considered or is called a sun if it is the center of a planetary system. Our own sun is the largest object that you can find in our solar system. 

The answer is B. 

35. The sun, is the closest star to Earth specifically. It is about 93 million miles away. It is brighter than the other stars because of its closeness. It makes up 99.8% of the total mass of our solar system. 

The answer is B. 
36. Light from the sun travels at the speed of light. It takes 8 minutes and 20 seconds for it to travel from the sun to the surface of the Earth at an average. It varies at times because the orbit of the Earth is elliptical. 

The answer is A. 

Its either a) or b),wind and water erosion gradually widen the canyon

If the experiment was perfomed more then once and you get the same results