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What type of bond is formed when two atoms share electrons?

  • (A) Ionic bond
  • (B) Covalent bond
  • (C) Metallic bond
  • (D) Hydrogen bond

Answer: Covalent bond

In a covalent bond, electrons are shared between atoms, allowing them to bond and form molecules.

Which of the following is NOT a form of energy?

  • (A) Light energy
  • (B) Sound energy
  • (C) Time energy
  • (D) Heat energy

Answer: Time energy

Time is not a form of energy, whereas light, sound and heat are all different forms of energy.

Which of the following is an example of a non-renewable resource?

  • (A) Wind energy
  • (B) Solar energy
  • (C) Coal
  • (D) Hydroelectric power

Answer: Coal

Coal is a non-renewable resource as it takes millions of years to form and is depleted once used.

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What is the unit of force in the International System of Units (SI)?

  • (A) Newton
  • (B) Watt
  • (C) Joule
  • (D) Ampere

Answer: Newton

The SI unit of force is the Newton (N), which is used to measure the amount of force applied to an object.

Which of the following is the most abundant element in the Earths crust?

  • (A) Iron
  • (B) Silicon
  • (C) Oxygen
  • (D) Carbon

Answer: Oxygen

Oxygen is the most abundant element in the Earths crust, forming a large percentage of minerals such as silicates.

What is the name of the planet closest to the Sun?

  • (A) Venus
  • (B) Mercury
  • (C) Earth
  • (D) Mars

Answer: Mercury

Mercury is the planet closest to the Sun in the solar system, with an average distance of about 57.9 million kilometers.

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What is the primary function of the circulatory system?

  • (A) Carry oxygen
  • (B) Filter blood
  • (C) Break down food
  • (D) Control movement

Answer: Carry oxygen

The circulatory system is responsible for transporting oxygen and nutrients to body cells and carrying away waste products.

Which type of bond is formed by the sharing of electron pairs?

  • (A) Ionic bond
  • (B) Covalent bond
  • (C) Hydrogen bond
  • (D) Metallic bond

Answer: Covalent bond

In a covalent bond, electrons are shared between two atoms, creating a stable connection.

Which of the following is a type of simple machine?

  • (A) Lever
  • (B) Gear
  • (C) Pulley
  • (D) Engine

Answer: Lever

A lever is a simple machine that uses a rigid bar to pivot around a fulcrum to lift or move objects.

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What is the chemical formula for oxygen gas?

  • (A) O
  • (B) O2
  • (C) O3
  • (D) O4

Answer: O2

Oxygen gas exists as a molecule composed of two oxygen atoms, represented by the formula O2.

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