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Science 1st Grading Grade 8

Total questions: 47

Worksheet time: 50mins

Name
Class
Date
1.

states that an object at rest remains at rest and an object in constant motion remains to be in that state of motion unless acted upon by an external force

(a)  

2.

the property of objects when it opposes changes in motion

(a)  

3.

amount of matter an object contains

(a)  

4.

force acting on the matter when acted upon by the force of gravity

(a)  

5.

explained how objects move the way they move according to how we observe them

(a)  

6.

motion that was caused and imposed

(a)  

7.

states that the direction of the net force and acceleration are the same, both are directly related while acceleration and mass are inversely related

(a)  

8.

summation of all forces acting on an object in a given situation, causes acceleration

(a)  

9.

when surfaces slide or tend to slide over one another

(a)  

10.

when a force is applied and the object get distributed, even if it doesnt move

(a)  

11.

application of force until static friction is overcome will result in motion

(a)  

12.

states that when two objects interact, there is an action force that is exerted by the first object to the second object, at the same time vice versa

(a)  

13.

the measure of how fast work is done

(a)  

14.

when changes in position and force are multiplied

(a)  

15.

Who had the initial idea about Newton's 1st law of motion

(a)  

16.

this setup is invented to illustrate the constant acceleration of two coupled objects of varying masses

(a)  

17.

is a useful representation of al the forces acting on an object in order to determine the net force that causes it to accelerate

(a)  

18.

enables an object to perform work

(a)  

19.

when energy is stored by an object

(a)  

20.

it is used to do work when the process of chemical change takes place

(a)  

21.

potential energy possessed by an object due to its position above the ground

(a)  

22.

energy in motion

(a)  

23.

associated with our sense of hearing

(a)  

24.

3 elements of sound

4 lines
25.

ratio of the mass and the volume of the substance

(a)  

26.

this effect says that "pitch of the source is dependent on frequency"

(a)  

27.

who discovered the doppler effect

(a)  

28.

quantities measured of radiations

(a)  

29.

a British scientist demonstrated and showed how light was internally reflected along the curved path of flowing water that escapes through a hole

(a)  

30.

any radiation that is near or even in the visible region of the electromagnetic spectrum.

(a)  

31.

ROYGBIV meaning

(a)  

32.

is credited for developing a successful lighting system

(a)  

33.

Very 1st Lighting system. It is not very efficient, less than 10% of its energy is visible light while the rest goes to the emission of heat

(a)  

34.

inside this bulb, there is a mercury gas that gets excited when there is electric current. They are efficient in terms of using energy

(a)  

35.

Powder Coating inside the interior of a fluorescent light called

(a)  

36.

Sealed, electrified glass tube that is filled with neon gases

(a)  

37.

1st sodium lamp that glows with a monochromatic yellow-colored light

(a)  

38.

Improved design of the LPS in terms of increased efficiency and economic value

(a)  

39.

types of lights that are an advanced form of incandescent lamps. Usually used on cars

(a)  

40.

property of any object that gives different perceptions to the eyes

(a)  

41.

creating different colors by mixing different light colors is a method called

(a)  

42.

primary colors of light

(a)  

43.

result when two primary colors combine

(a)  

44.

secondary colors of light

(a)  

45.

used when colors appearance are determined by subtracting the colors that are absorbed when different colors combine

(a)  

46.

type of subtractive color model that is used in the printing process

(a)  

47.

CMYK Model is also known as

(a)