Abeka 8th grade Science section review 9.3

What is an anemometer used for?

Wind speeds near the earth's surface are measured by an anemometer.

What is a maximum-minimum thermometer used for?

A maximum-minimum thermometer is used for recording the highest and lowest temperatures of the day and night during a particular period.

Define radiosonde.

An instrument that simultaneously measures and transmit meteorological data from balloons to weather stations below is the radiosonde.

What three things can Doppler radar measure?

Doppler radar can measure precipitation, wind speed, and wind direction.

What unit of pressure is approximately equal to atmospheric pressure?

The bar is the unit of pressure that approximately equal to atmospheric pressure.

What type of hygrometer measures humidity using the cooling effect of evaporating water?

The psychrometer is the type of hygrometer that measures humidity using the cooling effect of evaporating water.

What feature of a surface weather chart shows the conditions measured at a particular weather station?

The station model is the feature of a surface weather chart shows that conditions measured at a particular weather station.

What device do meteorologists use to process all of the information they collect about weather conditions?

The supercomputer is the device that meteorologists use to process all of the information they collect about weather conditions.

Give two signs of an approaching warm front and two signs of an approaching cold front.

The two signs of an approaching warm front are that cirrus and cirrostratus clouds leads to altostratus, nimbostratus and cumulonimbus, and stratus; and drizzly rain appears. The two signs of an approaching cold front are that altocumulus and stratocumulus clouds give way to nimbostratus and cumulonimbus; and a drop in atmospheric pressure.

When the relative humidity is 100%, the wet-bulb and dry-bulb temperatures given by a psychrometer are the same. Why is this?

The wet-bulb temperature is normally lower than the dry-bulb temperature because evaporating water cools the wet-bulb thermometer. At 100% relative humidity, no water can evaporate, so the wet-bulb thermometer is not cooled.