CH 8 Warm Up #1 4/10

Answer the following questions about the videos we watched yesterday

1. Which food let off the most heat (potato chip, almond, or brazil nut)?

2. Which one stored the most energy?3. Which would you eat for getting the most energy?4. How do we get the energy out of food? (best guess)5. What is one other thing you remember about the

video?

Agenda 4/10

• CH 8 Notes #1• Thinking Maps & Question

CH 8 Notes #1 Matter and Energy

Matter

• Anything that has mass and takes up space

Atoms• The smallest unit of matter– Protons (+ charge)– Electrons (- charge)– Neutrons (no charge)

• Elements: atoms of the same type– Examples: Carbon, Hydrogen, Oxygen

– Non-examples: Carbon dioxide, Water

• Chemical bond: the attraction holding atoms together

Energy is stored in these bonds

• Two or more atoms joined is a molecule

• Molecules with at least 2 different elements in them are compounds

Major elements in living things

• There are over 100 elements on the periodic table

• Only 6 elements make up most of the parts of living things (CHNOPS)

The 6 most common elements in living things (CHNOPS)

• C Carbon• H Hydrogen• N Nitrogen• O Oxygen• P Phosphorus• S Sulfur

Check for Understanding

• Turn to your neighbor & answer these questions :be ready to share-out for points!

1) What do we call atoms of the same type?2) What holds atoms together?3) What is stored in these bonds?4) What is CHNOPS?

Matter & Energy

• Law of Conservation of Matter & Energy: Matter and energy cannot be destroyed or created, only changed

There are 7 forms of energy, we’re going to focus on these 3

1. Light

2. Heat

3. Chemical

Living things need energy

• Living things need energy to -Grow-Move-Replace/Repair-Cell functions-Body functions

Living things get energy from food by…

Living things get energy from food by breaking and forming new chemical bonds

Important: Some organisms make their own food (e.g. plants). Others must get it

by eating (e.g. animals, fungi)

• Calories: The energy stored in the chemical bonds of food

• Calories: The energy stored in the chemical bonds of food

• Food also gives us the pieces for building other molecules (biosynthesis)

Some examples of heat energy being released

• A person eats hamburger, allowing her muscles to move

• A raccoon eats crayfish, allowing it to keep its body warm

• A plant breaks down sugars, heating-up its flower and pumping a smell into the air

CFU

1 = A2 = B3 = C4 = D

1. All living things need to eat other things to get energy

A. TrueB. False

CFU: Multiple Choice & Debate

2. Which of these explains how living things get energy from food

A. They split the atoms into protons and neutrons

B. They absorb heat from the foodsC. They break chemical bonds & form new ones

3) Which food would give you the most energy?A. 100 caloriesB. 500 caloriesC. 300 caloriesD. 400 calories

4. What do living things use energy for?A. GrowB. ReproduceC. SurviveD. Replace cells

5. Heat, light, and chemical are all types of:A. EnergyB. MatterC. ElementsD. All three

6) TRUE/FALSE When paper is burned the chemicals in the paper are destroyed and energy is released

Thinking Maps

• Create two circle mapsOne on MatterOne on Energy

• Each must include facts for each• On the back write 1 sentence explaining how

matter and energy are related

• Matter is what all things are made of• Energy is what all things need to move/change