Which of the following are used in projectors?

• A) Concave lens

• B) Convex mirrors

• C) Plane mirrors

• D) Convex lenses

What happens during lateral inversion?

• A) The right of the object will be on the right side of the image.

• B) The left side of the object will be on the left side of the image.

• C) The upper part of the object will be at the bottom of the object.

• D) The right side of the object will be on the left side of the image.

A reflecting surface is curved outwards. Which of the following mirrors is it likely to be?

• A) Concave

• B) Plane

• C) Convex

• D) All of the above

Which of the following is/are products of wastewater treatment?

• Biogas

• Sludge

• Both biogas and sludge

• Aerator

Which process during waste water treatment helps in eliminating germs?

• Aeration

• Sedimentation

• Chlorination

• None of the above

The pollen grains are found in this part of the stamen.

• anther
• style
• pistil

The enlarged base of the pistil that stores the eggs of the plant is the ___.

• ovary
• ovule
• stigma
• style

They enclose the egg cells inside the ovaries.

• ovules
• anther
• seeds
• stamen

IDENTIFY THE DEVICE AND ITS USE

• ANEMOMETER, TO FIND WIND DIRECTION

• BAROMETER,TO FIND WIND SPEED

• ANEMOMETER TO FIND WIND SPEED

• NONE OF THESE

WHAT HAPPENS TO AIR ON HEATING?

• IT STOPS MOVING

• IT EXPANDS AND BECOMES LIGHTER

• IT CONTRACTS AND BECOME LIGHTER

• IT EXPANDS AND BECOME HEAVIER