Q: How distant is the closest star?

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

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

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

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

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

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

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

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

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

Q: What is NOT a greenhouse gas?

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

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

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

Q: What the main particles of an atom are?

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

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

1. Potential energy
2. Kinetic energy
3. Chemical 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. Equator length
3. Effective length
4. Magnetic equator

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

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

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

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

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

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

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

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