Heat is a form of ________.

(a)

electrical energy

(b)

gravitational energy

(c)

thermal energy

(d)

None of these

Conduction is the heat transfer which takes place in a____________.

(a)

solid

(b)

liquid

(c)

gas

(d)

All of them

Fuse is

(a)

a switch

(b)

a wire with low resistance

(c)

a wire with high resistance

(d)

a protective device for breaking an electric circuit

Aerated water contains

(a)

air

(b)

oxygen

(c)

carbon dioxide

(d)

nitrogen

Carbon dioxide with water changes

(a)

blue litmus to red

(b)

red litmus to blue

(c)

blue litmus to yellow

(d)

doesn’t react with litmus

In water, hydrogen and oxygen are combined in the ratio of _______by mass.

(a)

1:8

(b)

8:1

(c)

2:3

(d)

1:3

Cockroach moves with the help of its

(a)

leg

(b)

bone

(c)

muscular foot

(d)

whole body

Which one of the following categories of vertebrae are correctly numbered.

(a)

Cervical-7

(b)

Thoracic-10

(c)

Lumbar - 4

(d)

Sacral - 4

During menstruation, the progesterone level is ___________

(a)

decreased

(b)

increased

(c)

ceased

(d)

normal

Tux Math software helps in learning the ________

(a)

painting

(b)

arithmetic

(c)

programming

(d)

graphics

What is conduction?

Write a note on convection.

Define specific heat capacity

How charges are produced by friction?

What is earthing?

What is electric circuit?

What are the sources of oxygen?.

List out the uses of nitrogen

Write about the reaction of nitrogen with non metals.

State the law of constant proportions.

Write the properties of anode rays.

Write the names of the following compounds.
a) CO
b) N₂O
c) NO₂
d) PCl₅

Why our backbone is slightly moveable?

Define Muscle

Differentiate tendons and ligament

List out the changes which occur during puberty.

How is adolescence differ from childhood?

What is the use of Text Tool?

What is the shortcut key for Save option?

What is Tux Math?

Explain the working of thermos flask.

What is electroscope? Explain how it works?

Write the chemical formula for the following compounds
a) Aluminium sulphate
b) Silver nitrate
c) Magnesium oxide
d) Barium chloride

Briefly describe the menstrual cycle.

Which one of the following statements about thermal conductivity is correct? Give reason.
a) Steel > Wood > Water
b) Steel > Water > Wood
c) Water > Steel > Wood
d) Water > Wood > Steel

How do astronauts breathe when they go beyond earth’s atmosphere?

How can we prove that the electrons carry negative charge?

What is a streamlined body? How does it help in the movement of animals that fly or swim in water?

What can you suggest to your classmates to keep himself/herself clean and healthy?

An iron ball requires 1000 J of heat to raise its temperature by 20°C. Calculate the heat capacity of the ball.