Unit 6

Question 1

What was Von Helmont testing with his willow tree experiment? What was the result?

Answer 1

He wants to see if plants grow by eating soil through their roots. The result is the tree grew eventually by eating soil

Question 2

Define the law of conservation of mass

Answer 2

Mass cannot be created nor destroyed. It only changes form.

Question 3

Describe the experiment used by Joseph priestly to discover oxygen

Answer 3

He placed lit candle in a sealed jar and when he did that the flame went out because there wasn’t any oxygen and it couldn’t breath

Question 4

List the primary constituents of air

Answer 4

1- 78% nitrogen 
2- 21% oxygen
3- 0.9% argon
4- 0.03% carbon dioxide
5- 0.02% water

Question 5

What did Jan Ingenhousz discover oxygen

Answer 5

Plants need sunlight in order to release oxygen

Question 6

Based on the work of Nicolas de Saussure, what are the two primary sources of mass for plants?

Answer 6

Water and carbon

Question 7

Photosynthesis-

Answer 7

Plants use light to make tissues

Question 8

Potential energy-

Answer 8

Stored energy that exists as a result of position or chemical structure

Question 9

Kinetic energy-

Answer 9

Energy in motion

Question 10

Define each of the 3 wavelengths of energy released by the sun

Answer 10

A. Visible light- we are able to detect w our eyes
B. Ultraviolet- has a shorter wavelength than visible light and is able to penetrate living tissue
C. Infrared(heat)- has a longer wavelength than visible light

Question 11

The primary location of photosynthesis is _______, which contain the organelle _________, each of which is filled w the green pigment _______.

Answer 11

Leaves; chloroplasts; chlorophyll

Question 12

What organism is believed to be the origin of the chloroplast

Answer 12

Mitochondria

Question 13

Write the full reaction of photosynthesis

Answer 13

Carbon dioxide and water are used to synthesize glucose, which can be used to produce starch or cellulose. C6H1206 6H20 602

Question 14

What are the light dependent reactions of photosynthesis

Answer 14

They can only occur when sunlight is available

Question 15

Explain what happens in each photosystem of chloroplasts

Answer 15

Photosystem 2- A photon of light strikes and arrangement of chlorophyll and it causes the excitement of electrons and the splitting of water

Photosystem 1- where the electron is passed and is re-energized by another futon and used to generate an electron carrier called NADPH

Question 16

What wavelength of light does the Clora Phil and photosystem one and to respond best to?

Answer 16

Infrared

Question 17

How is ATP generated during the light dependent reactions?

Answer 17

And electron transport chain and chemiosmosis, which is similar to what happens during cell respiration

Question 18

Give the Greek root word meaning for photoautotroph

Answer 18

Photo- “light”
Troph- “nutrition”
Autos- “self”