Science Concepts Quiz

Why does helium make your voice sound higher?

• It makes vocal cords vibrate slower.

• It decreases the density of air.

• It increases the density of air.

• It makes vocal cords vibrate faster.

What is the main reason bubbles float on sulfur hexafluoride?

• Bubbles are filled with sulfur hexafluoride.

• Bubbles are heavier than sulfur hexafluoride.

• Bubbles are filled with helium.

• Bubbles are less dense than sulfur hexafluoride.

Which of the following is NOT a polymer mentioned in the sale?

• Polycarbonate

• Polytetrafluoroethylene

• Polypropylene

• Polystyrene

What makes crunchy slime different from other types of slime?

• It hardens overnight.

• It contains beads.

• It glows in the dark.

• It is made with cornstarch.

What is the role of starch in slime making?

• It acts as a polymer.

• It gives color to the slime.

• It bonds the polymers together.

• It makes the slime glow.

What is a sign of a chemical change?

• Dissolving in water

• Change in shape

• Production of light or heat

• Mixing without reaction

Which of the following is a physical change?

• Baking a cake

• Rusting of iron

• Burning of wood

• Mixing sugar in water

What does frequency measure in terms of vibration?

• The color of vibration

• The distance of vibration

• The speed of vibration

• The direction of vibration

What happens to the vibro bot when it is not sturdy enough?

• It vibrates slower.

• It falls apart.

• It creates more art.

• It stops vibrating.

What is the relationship between vibration and frequency?

• Vibration is the speed of frequency.

• Frequency is how fast vibration occurs.

• Frequency is the distance of vibration.

• Vibration is the color of frequency.