Matter
Matter is...
Everything!!!
Atoms are the basic...
The basic building blocks of life
What kind of table can you find elements on?
The Periodic Table
Why do plants go through photosynthesis?
To make fuel (their food)!
True or false:
The Scientific Method is used to explore BOTH old and new ideas.
True!
Identify if the following are chemical or physical changes:
Breaking a graham cracker, melting chocolate, and roasting a marshmallow.
Graham cracker: Physical
Melting chocolate: Physical
Roasting a marshmallow: Chemical
What are 3 basic states of matter?
Solid, liquid, and gas
What are three basic parts of an atom?
Protons, neutrons, and electrons
What is the element symbol? How many letters can it be?
A one or two letter abbreviation for an element's name
Reactants: Carbon dioxide (air), water, and sunlight
Products: Glucose and oxygen
True or false:
When using The Scientific Method, it is recommended to only test your experiment one time.
False!
You should test your experiment multiple times to ensure accurate data.
Observation or inference:
The leaves are green
Observation
A molecule is...
2 or more atoms
Atoms are composed mostly of...
Empty space
True or False:
Elements can be broken down into other substances
False
Elements are the simplest substance! They cannot be broken down into any other substance.
True or false:
Photosynthesis is a chemical reaction.
True!
Name all of the steps in The Scientific Method. (hint: there are 7 we have gone over)
Question, hypothesis, materials, procedure, data, analysis, and conclusion
Observation or inference:
The leaves are green so it must be spring
Inference
Matter is made up of ______.
Particles
Atoms
The center of an atom is called the ______. It is made up of ______ and _______.
(3 answers)
Nucleus
Protons and Neutrons
What does the atomic number of an element represent? Can atoms have the same atomic number?
The number of protons in the nucleus
No
What do the stomata, xylem, and chlorophyll do in photosynthesis?
Stomata: allows carbon dioxide to enter
Xylem: water enters through the roots and the xylem distributes throughout the plant
Chlorophyll: absorbs sunlight in the leaves
What is the difference between an observation and inference?
Observations are made using one or more of your five senses, while inferences are made using information you already know, combined with information from an observation.
Identify the independent variable, dependent variable, and controlled variable:
A scientist wants to know how many Flaming Hot Cheetos a 7th grader would need to eat before getting sick.
Independent: The number of Flaming Hot Cheetos
Dependent: When the 7th grader gets sick
Controlled: eating Flaming Hot Cheetos
Describe how particles are arranged in the 3 basic states of matter.
Hint: Are they tightly packed? Are they far away?
Solid: Tightly packed
Liquid: Packed together, but has some room
Gas: Loosely arranged
How many carbon atoms are in CO2?
How many oxygen atoms are in CO2?
Carbon: 1
Oxygen: 2
You add the number of protons and neutrons
Name the formula for photosynthesis
6Co2 + 6H20 --(sunlight)--> C6H12O6 + 6O2
What is the difference from an independent variable, dependent variable, and controlled variable?
Independent: what you are changing
Dependent: what you are observing
Controlled: what you are keeping the same
Identify the independent variable, dependent variable, and controlled variable:
Ex. A scientist wants to find out which brand of bath soap would make the bubbliest bath.
Independent: the various brands
Dependent: the amount of bubbles
Controlled: bath