Science Quiz Review Sheet-Weather: Investigations 1 an

82411_7investigation_1_and_2_quiz_review_sheet_key.pdf Name: _________________________________ Date: __________________________ Science Quiz Review Sheet-Weather: Investigations 1 and 2-KEY In order to pass this test, you should be able to: DEFINE THE FOLLOWING TERMS (Review notes/quizlet link: https://quizlet.com/113182290/flashcards): forecast, meteorologist, meteorology, prediction, severe weather, weather, wind, thermometer, compass, wind meter, hygrometer, barometer, air pressure, climate, humidity, precipitation, temperature, air, compress, expand, mass, matter, particle, pressure, state, weight

UNDERSTAND KEY CONCEPTS:

List some of the weather conditions that can be measured

Temperature, air pressure, humidity, etc.

Explain the difference between weather and climate Weather is the condition of Earth's atmosphere at a given time in a given place. Climate is the average weather at a given place over a long period of time.

Describe the characteristics of air

Air can be compressed (pushed into a smaller space). Air has mass. Air takes up space.

What is the best evidence that air has mass?

It can be weighed.

Know that everything in the world is made up of:

matter

Identify the three states of matter:

solid, liquid, gas

Tell how we measure the amount of matter

The amount of matter ‹• ...ƒŽŽ‡† ƒ ‘"Œ‡...-ǯ• ƒ•• ƒ† ‹-ǯ• ‡ƒ•—"‡† ‹ ‰"ƒ•Ǥ

Describe the difference between mass and weight.

Mass is a measure of how much matter something is made of; weight is the measure of the pull between Earth and the matter in an object. RECALL WHAT HAPPENED IN OUR EXPERIMENTS WITH AIR PRESSURE- Virtual Syringe: http://bit.ly/1PBLEN2

A student traps air in a syringe by clamping it. When he pushes down on the plunger, what happens to

the air particles?

The air compresses pushing particles together (increases density), but number of particles and size

CBǯ4 ...Šƒ‰‡Ǥ Particles bump into each other more often, creating pressure.

Link to Virtual Syringe: http://bit.ly/1PBLEN2

Why is it difficult to push the plunger down further? The compressed particles are pushing against the plunger more often, against your force. What happens when the student stops pushing down on the plunger?

Gas will expand in a larger space (plunger rises, creating space in syringe) and particles will get

farther apart (lowers pressure). Explain why after releasing the plunger after pushing it in, it will slowly rise but stop.

The compressed air particles start to spread out again in the syringe and †‘ǯ- Š‹- ƒ‰ƒ‹•- "Ž—‰‡" ƒ•

often. Plunger will stop when there is an even number of hits from both outside and inside of the plunger

(equal air pressure). Explain why when you pull up on the plunger, it will pull back down into to the syringe.

When you pull up, it creates less pressure on the inside of syringe (and more pressure outside of the

plunger). The plunger moves down, which causes the inside particles to move closer again, compressing space between them, until there are even numbers of hits from both outside and inside of the plunger (equal air pressure). RECALL CONCEPTS IN OUR EXPERIMENT TO DETERMINE WHETHER AIR IS MATTER AND HAS MASS: Why does a balloon of compressed air weigh more than a balloon of uncompressed air?

A balloon ‘ˆ ...‘""‡••‡† ƒ‹" ™‡‹‰Š• ‘"‡ -Šƒ ‘‡ ™‹-Š —...‘""‡••‡† ƒ‹" "‡...ƒ—•‡ -Š‡"‡ǯ• ‘"‡

particles packed into the compressed air balloon.

What did the heavier compressed air prove?

Since we added air to the balloon, the air had more weight. it meant there was more mass (more of an amount of matter) in the balloon Describe two kinds of evidence that support air is matter Matter is anything that has mass and takes up space. Air has both.

1. When we pumped air into the balloon, it weighed more. The extra mass was the air we pumped

in. That means air has mass.

2. We couldn't push the plunger in the syringe completely to the bottom because there was air

trapped inside. The air took up space.