Q: How distant is the closest star?

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

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

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

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

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

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

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

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

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

Q: What is NOT a greenhouse gas?

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

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

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

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

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

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

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

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

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. Molecule
3. Atom
4. Mixture

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

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

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

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