Catalyst:1.Mouths are quiet.2.Get your folder out and begin the

quick review section of your notes.3.Raise your hand if you need

something.

Quick Review

In giraffes, there is a gene that controls tongue color. The dominant tongue color is black while the recessive tongue color is pink. A homozygous dominant giraffe is crossed with a homozygous recessive giraffe. Use this information to answer the following questions.

1. Show the abbreviated genotypes for the cross: TT x tt2. Setup the tool needed to correctly predict the trait in offspring

 T T  

t tT tT

t tT tT

Quick Review

In giraffes, there is a gene that controls tongue color. The dominant tongue color is black while the recessive tongue color is pink.

3. What is the percentage chance that offspring will have a black tongue? 100%4. What is the percentage chance that offspring will have a pink tongue? 0%5. What is the percentage chance that offspring will be a carrier for the pink tongue trait? 100%

T T  

t tT tT

t tT tT

LESSON 8 .4 – WEATHER DATA AND AIR PRESSURE

Weather

I can list important weather data and how it is gathered. I can predict weather based on barometric pressure. (4c)

1. Scientists that study the weather, called meteorologists, must collect data (information) to make predictions about the weather.

I can list important weather data and how it is gathered. I can predict weather based on barometric pressure. (4c)

Name: PrecipitationDescription: How

much water falls to Earth.

Measurement Tool: Rain gauge

I can list important weather data and how it is gathered. I can predict weather based on barometric pressure. (4c)

Name: WindDescription: Where

and how fast air molecules are moving

Measurement Tool: Anemometer (speed); wind vane (direction)

I can list important weather data and how it is gathered. I can predict weather based on barometric pressure. (4c)

Name: TemperatureDescription: How

quickly air molecules are moving.

Measurement Tool: Thermometer

I can list important weather data and how it is gathered. I can predict weather based on barometric pressure. (4c)

Name: HumidityDescription: How

much water vapor is in the air.

Measurement Tool: Hygrometer or Psychrometer

I can list important weather data and how it is gathered. I can predict weather based on barometric pressure. (4c)

Name: Air pressureDescription: How

much the atmosphere is pushing down on Earth.

Measurement Tool: Barometer

I can list important weather data and how it is gathered. I can predict weather based on barometric pressure. (4c)

3. Air Pressure is often also called barometric pressure.

a. Air pressure is different around the world and changes. It varies mostly because of differences in the amount of sunlight an area receives.

I can list important weather data and how it is gathered. I can predict weather based on barometric pressure. (4c)

b. If an area receives lots of sunlight, the air is warmer and less dense which pushes down on Earth less giving a lower air pressure.c. If an area receives less sunlight, the air is cooler and more dense which pushes down on Earth more giving a higher air pressure.

I can list important weather data and how it is gathered. I can predict weather based on barometric pressure. (4c)

4. Changes in air pressure help us to predict changes in weather.

a. If air pressure drops, this means a low pressure weather system is moving in. This usually brings clouds and rainy or snowy weather.b. If air pressure rises, this means a high pressure weather system is moving in. This usually brings sunny, fair weather.

Guided Practice

Guided Practice

1. A student is using a tool called an anemometer. What is she measuring? Wind speed2. In order to predict weather, a meteorologist needs to determine air pressure. What is he actually measuring, and what tool would he use? He is measuring how much the atmosphere is pushing down on the Earth. He would use a barometer.3. Seattle, Washington gets little sunlight. Predict the air pressure in this location. Air pressure will be high because the air is cooler and more dense which means it presses on Earth harder.

Guided Practice

4. How is the air pressure changing from Wednesday to Thursday? The air pressure is increasing from Wednesday to Thursday.5. What prediction can you make about the weather on Thursday from this change in air pressure? The weather will be sunny with few clouds and no chance of rain.

ThursdayWednesday

DO YOU KNOW WHAT THAT MEANS?

I-N-D-E-P-E-N-D-E-N-T

(5 QUESTIONS)

Exit Ticket

1. A student is measuring the amount of water vapor in the air. Which of these devices is she using?

A. ThermometerB. AnemometerC. PsychrometerD. Barometer

2. Which of these describes the device shown in the picture?

A. It is a psychrometer used to measure humidity.

B. It is an anemometer used to measure wind.

C. It is a thermometer used to measure temperature.

D. It is a barometer used to measure air pressure.

3. Which of these describes air pressure?A. How quickly air molecules are

moving. Measured with a psychrometer.

B. How much Earth’s atmosphere pushes on the surface. Measured with a psychrometer.

C. How quickly air molecules are moving. Measured with a barometer.

D. How much Earth’s atmosphere pushes on the surface. Measured with a barometer.

4. The passage below explains why a certain area has low air pressure but several words have been left out. Put the terms in the correct order to make the passage true. You may use a word more than one time.

An area of low pressure receives ____ sunlight. This causes the air there to be dense causing the air to push on Earth’s surface with force.

A. MoreB. LessC. Some

5. A student measures the air pressure for three days. Her data is shown in the table below. Which of these explains how the weather will change?

A. Clear with sunshine and no rain.B. Partly cloudy with no rain.C. Heavy clouds with a 100% chance

of rain.D. Sunshine with small thunderstorms

through the day.

Day 1

Day 2

Day 3

Pressure (mmHg) 760.9 758.3 755.1