Student Questions

Questions created by CREST students. Answer them and earn Practice PointsHow to earn pointsAsk a question+3Answer a question+1Someone answers yours+1Your Q gets upvoted+1Pioneer bonus (first 5)+51 point = ₹1 discount on purchases!

Want to test your Olympiad skills? Take a FREE Practice Test — Classes KG to 10 Start Free Practice Test

All Grades KG Class 1 Class 2 Class 3 Class 4 Class 5 Class 6 Class 7 Class 8 Class 9 Class 10

Subject:

Sort:

Latest Popular

Showing: Class 9 (334 questions)

by GIANSH GUPTA · Class 9

Which of the following file formats typically uses lossy compression? a) ZIP b) PNG c) MP3 d) FLAC

Cyber Data Compression 0 0 answers 0%
by GIANSH GUPTA · Class 9

Run-Length Encoding (RLE) is most effective on data that has: a) Many different random values b) Long sequences of the same repeated values c) High-resolution video frames d) Very little redundancy

Cyber Data Compression 0 0 answers 0%
by GIANSH GUPTA · Class 9

What is a "compression ratio"? a) The speed at which a file is compressed b) The measure of how much a file is reduced in size c) The quality loss in a video file d) The number of files in a compressed folder

Cyber Data Compression 0 3 answers 67%
by GIANSH GUPTA · Class 9

What is the main purpose of data compression? a) To make files easier to open b) To reduce the number of bits needed to represent data c) To encrypt a file for security d) To increase the quality of an image

Cyber Data Compression 0 1 answers 100%
by GIANSH GUPTA · Class 9

Sound waves are called mechanical waves because: a) They can travel through a vacuum. b) They require a material medium (solid, liquid, or gas) to travel. c) They travel at the speed of light. d) They are transverse waves.

Science Sound 0 0 answers 0%
by GIANSH GUPTA · Class 9

When an object moves in a circular path with constant speed, its motion is: a) Uniform linear motion b) Non-accelerated motion c) Accelerated motion d) Motion with uniform velocity

Science Motion 0 0 answers 0%
by GIANSH GUPTA · Class 9

Which of the following is true for a body moving with uniform velocity? a) Its speed is changing. b) Its acceleration is zero. c) It moves in a curved path. d) Its direction is constantly changing.

Science Motion 0 6 answers 83%
by GIANSH GUPTA · Class 9

In Rutherford's gold foil experiment, most of the alpha particles passed straight through the foil. This led to the conclusion that: a) Atoms are solid spheres. b) Most of the space inside an atom is empty. c) The nucleus is negatively charged. d) Protons are distributed throughout the atom.

Science Structure of Atom 0 0 answers 0%
by GIANSH GUPTA · Class 9

An atom has an atomic number of 12. What is its valency? a) 1 b) 2 c) 3 d) 4

Science Structure of Atom 0 0 answers 0%
by GIANSH GUPTA · Class 9

Which subatomic particle was discovered by J.J. Thomson using the cathode ray experiment? a) Proton b) Neutron c) Electron d) Nucleus

Science Structure of Atom 0 0 answers 0%
by GIANSH GUPTA · Class 9

Which tissue is responsible for the increase in the girth (width) of a plant stem? a) Apical meristem b) Intercalary meristem c) Lateral meristem d) Parenchyma

Science Tissues 0 0 answers 0%
by GIANSH GUPTA · Class 9

Which of the following cannot be broken down into simpler substances by chemical reactions? a) Water b) Sodium chloride c) Sugar d) Oxygen

Science Is Matter Around Us Pure 0 0 answers 0%
by GIANSH GUPTA · Class 9

Which of the following will show the "Tyndall effect"? a) Salt solution b) Milk c) Copper sulfate solution d) Sugar solution

Science Is Matter Around Us Pure 0 0 answers 0%
by GIANSH GUPTA · Class 9

Which of the following is an example of a mixture? a) Pure water b) Table salt c) Lemonade d) Iron filings

Science Is Matter Around Us Pure 0 0 answers 0%
by GIANSH GUPTA · Class 9

When a gas is compressed, what happens to the particles? (a) They come closer together. (b) They move further apart. (c) They stop moving. (d) They turn into liquid.

Science Matter in Our Surroundings 0 0 answers 0%
by GIANSH GUPTA · Class 9

What is the SI unit of temperature? (a) Celsius (b) Fahrenheit (c) Kelvin (d) Pascal

Science Matter in Our Surroundings 0 0 answers 0%
by GIANSH GUPTA · Class 9

Which of the following has the strongest interparticle forces? (a) Oxygen (b) Water (c) Iron (d) Alcohol

Science Matter in Our Surroundings 0 0 answers 0%
by GIANSH GUPTA · Class 9

Which of the following is not matter? (a) Air (b) Smell of perfume (c) Love (d) Almonds

Science Matter in Our Surroundings 0 0 answers 0%
by GIANSH GUPTA · Class 9

The police caught the thief hiding ______ the bridge. A. In B. Under C. On D. At

English Prepositions 0 0 answers 0%
by GIANSH GUPTA · Class 9

"She has completed the project." Choose the passive form: A. The project was completed by her. B. The project is completed by her. C. The project has been completed by her. D. The project had been completed by her.

English Voices 0 0 answers 0%

1 ... 7 8 9 10 11 ... 17

70%