8th Science 1st Sem Exam

Front

What is resistance in electrical terms?

Back

Resistance is a measure of the opposition to the flow of electric current, measured in ohms (Ω).

Front

Which type of wire has lower resistance: long wires or short wires?

Back

Short wires have lower resistance compared to long wires.

Front

What is a meniscus in the context of liquids?

Back

The meniscus is the curved upper surface of a column of liquid in a container.

Front

How do you calculate kinetic energy?

Back

Kinetic energy (KE) is calculated using the formula KE = 0.5 * mass * velocity^2.

Front

What is the kinetic energy of a 0.75 kg object moving at 60 m/s?

Back

The kinetic energy is 1,350 J.

Front

What is the difference between qualitative and quantitative observations?

Back

Qualitative observations describe characteristics or qualities, while quantitative observations involve measurements and numbers.

Front

What is the most accurate instrument for measuring liquid volume?

Back

The graduated cylinder is the most accurate instrument for measuring liquid volume.

Front

What is the unit of measurement for mass?

Back

The unit of measurement for mass is the kilogram (kg).

Front

What does it mean if a measurement is qualitative?

Back

A qualitative measurement describes the quality or characteristics of an object, such as color or texture.

Front

What is the formula for calculating the volume of a rectangular prism?

Back

Volume = length × width × height.