Eureka # 21 What are asteroids made of? What are comets made of?

Answer: AsteroidsAsteroids are made of rock and/or metal. CometsComets are made of ice, small rocks, dust, and gas.

Eureka # 22 What causes weather?

Answer: The Sun causes an uneven heating of the Earth’s surface Cycling of water in and out of the atmosphere Air masses, ocean currents

Eureka # 23 Where are tropical zones located? Draw and label their locations. What type of weather occurs in these locations?

Answer: Nearest the equator The temperature is high because tropical zones receive direct sun rays all year

Tropic of Cancer Tropic of Capricorn Equator Tropical Zone

Eureka # 24 Where are the temperate and polar zones? Draw and label their locations. What type of weather occurs in each of these locations?

Answer: Polar Zones –located nearest the north and south poles –temperature is continuously cold b/c these poles are tilted away from the Sun Temperate Zones –located between tropical and polar zones –distinct changing seasons

Tropic of Cancer Tropic of Capricorn Equator Tropical Zone Temperate Zones Polar Zone

Eureka #25 Using the words EVAPORATION, CONDENSATION, PRECIPITATION, INFILTRATION, and RUNOFF draw and describe the water cycle.

Water Cycle 1.Evaporation – liquid water from bodies of water and plants (transpiration) changes into water vapor and becomes part of the atmosphere 2.Condensation – water vapor begins to cool and liquid droplets collect on dust particles high in the atmosphere, making clouds 3.Precipitation – once the clouds become heavy enough, solid or liquid water may fall from the sky as rain, sleet, snow, freezing rain, or hail 4.Infiltration – all water that soaks into the ground after precipitation; this could be used by plants or go to a body of water 5.Run-off – all water that is not soaked into the ground after precipitation eventually flows over land into bodies of water such as rivers, lakes, etc.

The Water Cycle

Eureka #26 How can warm and cold fronts be identified on a weather map?

A boundary between two air masses is called a front. Moving fronts indicate a change in weather.

COLD FRONT - blue sharp “teeth” pointing in the direction of the moving cold air. WARM FRONT - red rounded “teeth” pointing in the direction of the moving warm air.

Eureka #27 What type of weather is associated with low pressure? What type of weather is associated with high pressure?

High pressure - fair weather Low pressure - stormy weather

Eureka #28 In what direction do weather fronts generally move across the United States?

Highs and lows tend to travel from west to east across the United States, bringing changing weather as they move.

Eureka #29 What is energy? List 6 examples of energy.

Answer: Energy is the ability to do work. Forms include: –light –thermal –chemical –nuclear –electrical –mechanical (i.e., sound)

Eureka #30 Give an example of one type of energy changing to another.

Answer: Light to chemical in a plant (photosynthesis) Electrical to light when you turn on a light switch Chemical to heat when you digest food