Q: How distant is the closest star?

1. 54 million miles away
2. 72 million miles away
3. 93 million miles away
4. 127 million miles away

Q: Materials through which light cannot pass are said to be...?

1. Transparent
2. Opaque
3. Obstructor
4. Translucent

Q: What organelle is known as the 'brain' of the cell?

1. Cell membrane
2. Nucleus
3. Mitochondria
4. Chloroplast

Q: Bodies that radiate light are called...?

1. Non-luminous
2. Transparent
3. Opaque
4. Luminous

Q: What products are, as a general rule, the result of an acid and a base reacting together?

1. Water and a salt
2. Water and ethanol
3. Methane gas and nitrogen
4. Hydrogen gas and carbon dioxide

Q: What is NOT a greenhouse gas?

1. Nitrogen
2. Methane
3. Ozone
4. Carbon dioxide

Q: What gas plants contribute to the earth's atmosphere?

1. Oxygen
2. Carbon dioxide
3. Hydrogen
4. Nitrogen

Q: What the main particles of an atom are?

1. Photon and electron
2. Photon, electron, and neutron
3. Proton and electron
4. Neutron, electron, and proton

Q: What stored energy is commonly called...?

1. Kinetic energy
2. Chemical energy
3. Potential energy
4. Radiant energy

Q: The distance between one of the magnetic poles and the centre of the bar magnet is called the...?

1. Length of magnet
2. Effective length
3. Magnetic equator
4. Equator length

Q: Fill in the missing word: Acid +__ = salt +Water

1. Base
2. Non Metal
3. Metal
4. Oxygen

Q: Which of the following is the smallest part of a compound, whose properties are the same as those of the compound?

1. Element
2. Mixture
3. Atom
4. Molecule

Q: With which metal does oxygen combine to form rust?

1. Iron
2. Silver
3. Gold
4. Platinum

Q: Which of the following is a pure substance made up of two or more types of atoms or elements?

1. A mixture
2. An atom
3. A compound
4. An element