Science World Science News March 5

What is a muon?

• one of Saturn’s moons

• a pyramid in Egypt

• a fast-moving, charged particle smaller than an atom

• a period in the geologic time scale

What did the cosmic ray imaging technique used by researchers in the Great Pyramid of Giza reveal?

• a large sarcophagus in the King’s Chamber

• large, empty space inside the pyramid

• a smaller pyramid inside the structure

• a small Queen’s Chamber

How did the 245 participants who were attempting to set a world record in Brazil by jumping off a bridge while wearing harnesses attached to ropes reduce the chance of getting tangled?

• They used climbing ropes with plenty of elasticity

• They all slowed down at the same time.

• They descended quickly off the bridge

• They were connected to one another by stiff rope.

How did the jumpers stop moving in a side-to-side motion from the bridge?

• Rapid deceleration allowed them to stop.

• Friction from air resistance slowed them down until they stopped.

• They pressed on a brake to stop.

• They held each other’s hands to stop moving.

Why does chopping up raw onions make people cry?

• Onions contain a protein called alliinase that makes people cry.

• Onions contain a chemical called sulfenic acid that makes people cry

• Chopping up raw onions creates a new molecule that is released as a gas, which can reach people’s eyes.

• Chopping up raw onions causes dust and dirt to get into people’s eyes.

Chemical reactions ___________.

• form new molecules

• destroy molecules

• cause substances to change their states of matter

• happen only in nonliving things

Which of the following is TRUE about pterosaurs?

They lived among the dinosaurs. They are flying dinosaurs. They were the first invertebrates to fly.

• 1 only

• 2 only

• 1 and 2

• 1 and 3

About how many feet is a giant pterosaur’s wingspan?

• 13 feet

• 17 feet

• 30 feet

• 33 feet

Of the following, which is NOT a feature of Project Loon balloons?

• the ability to withstand high altitudes

• the ability to power their electronics using solar power

• the ability to communicate with other Loon balloons

• the ability to provide cable service

The feeding behavior found in Cratena peregrina sea slugs is called _________.

• cannibalism

• coprophagy

• kleptopredation

• parasitism