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BÀI KIÊM TRA THI KHTN

Total questions: 48

Worksheet time: 45mins

Name
Class
Date
1.

What do plants give off after photosynthesis?

a)

carbon

b)

hydrogen

c)

nitrogen

d)

Oxygen

2.

The organelle where photosynthesis takes place.

a)

Mitochondrion

b)

chloroplast

c)

nucleus

d)

vacuole

3.

What is the food manufacturing process in plants?

a)

respiration

b)

chlorophyll

c)

glucose

d)

photosynthesis

4.

The process of photosynthesis takes place in the:

a)

Leaves of the Plant.

b)

Stem of the plant.

c)

Roots of the plant.

d)

All of the above.

5.
What are the 3 key ingredients needed for photosynthesis
a)
glucose, oxygen, carbon dioxide
b)
carbon dioxide, water, glucose
c)
water, soil, sunlight
d)
sunlight, water, carbon dioxide
6.

Where do plants get the energy for photosynthesis to take place?

a)

nutrients in the soil

b)

the sun

c)

chlorophyll

d)

bee pollination

7.

Where do the leaves and stems of plants get their green color from?

a)

glucose

b)

oxygen

c)

carbon dioxide

d)

chlorophyll

8.
Which plant part absorbs water and nutrients?
a)
Leaf
b)
Stem
c)
Roots
d)
Flower
9.
What is the name of the sugars a plant produces after photosynthesis
a)
Glucose
b)
Sugar
c)
ATP
d)
Oxygen
10.

Where do plants get the energy for photosynthesis to take place?

a)

nutrients in the soil

b)

the sun

c)

chlorophyll

d)

bee pollination

11.
What is the pigment in chloroplasts that performs photosynthesis?
a)
Chlorosynthesis
b)
Chlorophyll
c)
ADP
d)
Electron Transport
12.
Plants need ________ for photosynthesis
a)
oxygen
b)
soil
c)
carbon dioxide
d)
sugar
13.
Which gas is removed from the atmosphere during photosynthesis?
a)
hydrogen
b)
oxygen
c)
nitrogen
d)
carbon dioxide
14.

During photosynthesis, the atoms in the water and carbon dioxide ________ to form oxygen and glucose.

a)

Change

b)

Multiply

c)

Rearrange

d)

Disappear

15.
What is the correct equation for photosynthesis?
a)
C6H12O6 + 6O2 --> 6CO2 + 6H2O
b)
6CO2 + 6O2 --> C6H12O6  + 6H2O
c)
 6CO2 + 6O2 --> 6H2O + C6H12O6
d)
6CO2 + 6H2O  -->  6O2 + C6H12O6
16.
What is the correct equation for photosynthesis?
a)
C6H12O6 + 6O2 --> 6CO2 + 6H2O
b)
6CO2 + 6O2 --> C6H12O6  + 6H2O
c)
 6CO2 + 6O2 --> 6H2O + C6H12O6
d)
6CO2 + 6H2O  -->  6O2 + C6H12O6
17.
How many valence electrons are elements trying to reach in their outer shells?
a)
1
b)
2
c)
5
d)
8
18.

Which of the following elements GAINS 1 electron in order to attain an octet?

a)

sodium

b)

calcium

c)

helium

d)

boron

e)

chlorine

19.

Which of the following elements LOSES 3 electrons in order to attain an octet?

a)

nitrogen

b)

lithium

c)

aluminum

d)

oxygen

e)

iodine

20.
What types of charges repel?
a)
Positive and Positive
b)
Positive and Neutral
c)
Negative and Neutral
d)
Neutral and Neutral
21.

The capacitance of 1 μF equals


a)

10 -12 F

b)

10-8 F

c)

10-6 F

d)

10-4 F

22.
What size resistor would produce a 3 Amp current flow with a 12 Volt battery
a)
1 Ohm
b)
3 Ohms
c)
4 Ohms
d)
12 Ohms
23.

If one bulb goes out in a series circuit, the remaining bulbs...

a)

also go out

b)

get brighter

c)

get dimmer

d)

explode, leaving shards of glass everywhere

24.

If the switch was opened, what would happen?

a)

the ammeter would measure a current flowing

b)

current would no longer flow, so everything would be off

c)

the bulbs would stay on because they're connected to the cell

d)

the bulbs would burn out and catch fire

25.

What are the examples of autotrophs?

a)

Plants

b)

Gorillas

c)

Pandas

d)

None of the above

26.

What do leaves convert carbon dioxide + water to

a)

nitrogen + oxygen

b)

oxygen + glucose (sugar)

c)

Both A and B

d)

None of the above

27.

During Photosynthesis, plants absorb_____ and release _____ gas.

a)

Oxygen, Carbon Dioxide

b)

Carbon Dioxide, Oxygen

c)

Nitrogen, Water Vapor

d)

None of the above

28.

The main function of a leaf is

a)

To prepare food

b)

To support the plant

c)

to prevent disease

d)

to give a proper shape

29.

What are the nutrients plants get from Air?

a)

Water

b)

Oxygen

c)

Carbon Dioxide

d)

Chlorophyll

e)

Sunlight

30.
Carbon dioxide
a)
C2O2
b)
C20
c)
CO
d)
CO2
31.
Phosphorous trichloride
a)
PCl3
b)
P3Cl
c)
P3Cl3
d)
PCL
32.
N2O5
a)
Nitrogen Oxide
b)
Dinitrogen pentaoxide
c)
Nitrate pentaoxide
d)
Dinitrate pentaoxide
33.

When phospherous reacts with air or oxygen what is formed

a)

Ca3P2

b)

2PCl3

c)

2P2O5

d)

2P2O7

34.

what is formed when phospherosreacts with sodium hydroxide

a)

PH3 + 3NaH2PO2

b)

PH5 + 3NaH3PO2

c)

PH3 + 3NaH2PO6

d)

PH3 + 6NaH2PO2

35.

what is superphosphate of lime used as

a)

fertilizer

b)

preservative

c)

rat poison

d)

reducing agent

36.

Based on the arrangement of the electric field lines in the diagram, what are the charges?

a)

both charges are the same

b)

the charges are opposite

c)

they are neutral; no charge

37.

Which statement best describes the electric fields in the image?

a)

The charges are neutral.

b)

Both charges are negative, so the field lines are alike.

c)

The field lines move toward a positive charge and away from a negative charge.

d)

The field lines move away from a positive charge and toward a negative charge.

38.

What happens to the field strength as the distance between two charged objects decreases?

a)

the strength stays the same

b)

the strength increases

c)

the strength decreases

d)

the strength fluctuates between positive and negative

39.

What is the unit of charge?

a)

Newton

b)

Joule

c)

Coulomb

d)

Farad

40.

What is the equation for the electric field of a point charge?

a)

E=kQr2E=\frac{kQ}{r^2}  

b)

E=kQrE=\frac{kQ}{r}  

c)

E=kQr3E=\frac{kQ}{r^3}  

d)

E=kQrE=kQr  

41.

Four point charges of equal magnitude but difference signs are arranged on the corners of a square as shown left. Which of the vectors shown represents the direction of the net force acting on the charge at the upper left-hand corner of the square due to the other charges?

a)

A

b)

B

c)

C

d)

D

42.

Two identical positive point charges, P and Q, separated by a distance r, repel each other with a force F. If r is decreased so that the electrical potential energy of Q is doubled, what is the force of repulsion?

a)

0.5 F

b)

F

c)

2F

d)

4F

43.

The force between two point charges is F when they are separated by a distance r.

If the separation is increased to 3r, what is the force between the charges?

a)
b)
c)
d)
44.
In the diagram below, P is a point near a negatively charged sphere. Which direction best represents the direction of the electric field at point P?
a)
Right
b)
Left
c)
Up 
d)
Down
45.

Nitric acid is an example of

a)

Hydracid

b)

Monobasic acid

c)

Weak acid

46.

In the combined state, nitric acid is found in the form of ?

a)

Chile saltpere nitre

b)

calcium nitrate

c)

both

d)

none

47.

During lightning discharge, the nitrogen present in the atmosphere reacts with what to form nitric acid?

a)

oxygen

b)

carbon dioxide

c)

ozone

d)

all of the above

48.

Nitric oxide is further oxidised to?

a)

nitogen dioxide

b)

nitric acid

c)

oxygen

d)

all of the above

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