Changes in Materials

What change will happen to the slices of potato if they will be exposed to oxygen in the air?

• Color will change from brown to white

• Color will change from white to brown

• The color will not change

• No changes in color

Tags

NGSS.MS-PS1-2

2. What causes the rusting of iron nails or iron made materials in a wet cloth?

• presence of heat

• absence of heat

• presence of oxygen

• absence of oxygen

When the candle was lighted, it melted into liquid and became solid again after few seconds or in a minute. What causes these changes?

I. presence of heat II. presence of oxygen

III. absence of heat IV. absence of oxygen

• I, II and III

• I and IV

• I and II

• All of the above

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

4. The candles melted by the application of heat. What change took place when solid candles became liquid?

• chemical

• mechanical

• no change

• physical

Tags

NGSS.MS-PS1-4

5. Which situation shows the presence of oxygen in a material?

I. Lighting of a candle III. Combustion of engines

II. burning of fuels IV. putting off a lighted candle

• I, II and III

• I and IV

• I and II

• All of the above

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

6. The eggplant/apple in the experiment turned its color from white to brownish. Which statement is NOT TRUE?

• The presence of oxygen caused change in its color.

• The absence of oxygen caused change in its color.

• The color of an apple/eggplant changed when it is exposed to

  oxygen in the air.

• There is oxidation that happened when apple/eggplant was sliced and exposed in the air.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Water is the primary cause of rust because water contains _____?

• Oxygen

• Chloride

• carbon

• hydrogen

8. Joram noticed that when he mopped the floor using wet rugs, the moist in the floor disappeared after few minutes. What is the reason why the floor became dry?

• presence of heat

• absence of heat

• presence of water

• absence of temperature

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

9. When physical change in materials happened, there is__________.

I. formation of new product or material

II. no formation of new product or material

III. formation of new shape

IV. formation of new color

• I, III and IV

• II only

• III and IV

• II and III

10. Hannah observed that the left over foods on the table became watery, spoiled and had foul odor after 48 hours. What caused this change in the material?

I. presence of heat III. presence of oxygen

II. absence of heat IV. absence of oxygen

• I and II

• II and III

• I and III

• II and IV

Tags

NGSS.MS-PS1-2