Energy and Matter
What is energy?
The ability to do work
How can you tell if a chemical equation is balanced?
If it has the same elements and amount of atoms on each side of the arrow
What is photosynthesis?
The process of chemical reactions in which plants make their food
What is cellular respiration?
The process by which humans, and other animals, create their food and the energy they need to survive
There is a connection between photosynthesis and cellular respiration. The products from one provide the raw materials for the other. What products of photosynthesis are starting materials for cellular respiration?
A. energy and carbon
B. sugar and oxygen
C. carbon dioxide and water
D. chlorophyll and chloroplasts
B. sugar and oxygen
What is matter?
Anything that takes up mass
How many hydrogens are in the reactants of this chemical equation:
2H2O + NaH --> 3H + NaHO2
What are the reactants of photosynthesis?
Carbon dioxide (CO2) and water (H2O)
What are the reactants of photosynthesis?
Oxygen (O) and glucose (C6H12O6)
Which property of nutrients provides evidence for the statement that nutrients are matter?
A. Nutrients are warm.
B. Nutrients have mass.
C. Nutrients can do work.
D. Nutrients contain energy.
B. Nutrients have mass.
What is the law that says matter can not be created or destroyed?
How many oxygens would have to be on the product side of the arrow for this equation to be balanced?
CO2 + 2NaO2
6
What are the products of photosynthesis?
Oxygen (O) and Glucose (C6H12O6)
What is the form of energy produced during cellular respiration that can then be used to carry out other functions in a cell?
ATP
How do organisms get the energy they need?
A. Plants get energy from fertilizers. Animals get energy from water.
B. Plants get energy from the soil. Animals get energy directly from sunlight.
C. Plants do not need energy because they do not move. Animals get energy from food.
D. Plants use energy from sunlight to make sugar molecules. Animals get energy from eating other organisms.
D. Plants use energy from sunlight to make sugar molecules. Animals get energy from eating other organisms.
How do plants get their energy?
From the sun
Is this chemical equation balanced?
Mg + O2 --> MgO
No, it is unbalanced.
How does photosynthesis help plants survive?
It creates their food
How does cellular respiration help animals survive?
It is how we break down what we bring into our body, how we produce cellular waste, and how we create energy
What happens to sugar inside a cell during cellular respiration?
A. The cell uses sunlight to create sugar.
B. The cell uses oxygen to destroy sugar.
C. The cell uses oxygen to break down sugar.
D. The cell uses sunlight to break down sugar.
C. The cell uses oxygen to break down sugar.
How do plants use energy?
To convert water and carbon dioxide to glucose and oxygen through photosynthesis
What would a balanced version of this chemical equation look like
Mg + O2 --> MgO
There should be another oxygen:
Mg + O2 --> MgO2
How does photosynthesis help humans survive?
It gives us oxygen to breathe in and glucose to use as energy
How does cellular respiration help plants survive?
It produces carbon dioxide and water used for photosynthesis