Quiz-a-Day Challenge (Day11) -Grade 8

What is the difference between a mixture and a compound?

• A) A mixture is made of two or more elements while a compound is made of two or more substances.
• B) A mixture is a homogeneous combination of two or more substances while a compound is a heterogeneous combination of two or more substances.
• C) A mixture is a heterogeneous combination of two or more substances while a compound is a homogeneous combination of two or more substances.
• D) There is no difference between a mixture and a compound.

What is an element?

• A) A substance that is made of two or more different elements that are chemically bonded together.
• B) A substance that is composed of atoms that have the same number of protons in their nuclei.
• C) A homogeneous mixture of two or more substances.
• D) A substance that is composed of atoms that have different numbers of protons in their nuclei.

Which of the following elements is a metal?

• A) Carbon
• B) Helium
• C) Sodium
• D) Chlorine

What is the most common element in the Earth's crust?

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

Which of the following is a compound?

• A) Gold
• B) Water
• C) Copper
• D) Oxygen

Which of the following elements is a halogen?

• A) Sodium
• B) Chlorine
• C) Calcium
• D) Iron

What is the atomic number of oxygen?

• A) 6
• B) 8
• C) 16
• D) 22

Which of the following is not a primary consumer in a food chain?

• A) Grasshopper
• B) Mouse
• C) Hawk
• D) Rabbit

Which of the following is a heterogeneous mixture?

• A) Sugar dissolved in water
• B) Air
• C) Milk
• D) Lemonade

What is the atomic number of carbon?

• A) 6
• B) 8
• C) 16
• D) 22