8th grade Science
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8th grade science homework
Final Study Guide
8th Grade Study Guide for Science Final 2022
- The difference between mass, weight, volume and density
- Atoms
- Electrons
- Bonds of electrons
- The names of the scientist who proved and diagramed the first atom, electron, nucleus of the atom and electrons that orbit the nucleus
- The difference between physical and chemical properties
- The difference between physical and chemical changes
- Viscosity
- What happens to particles when they change states
- The periodic table – what each symbol means
- Where different elements are on the periodic table and why
- Alpha, beta and gamma decay
- Explain the letters and numbers in a formula
- How does electric current flow in water
- Covalent bonds
- Endothermic and exothermic reactions
- Law of conservation of mass
5/23/22 Take home test due 6/1/22 (ten points off for each day it is late)
5/13/22 - Study Notes Work on Green Lab - due Wednesday May 19
5/4/22 - study notes - work on Can Green be Clean lab
4/29/22 After the next section - we are going to build a lava lamp - to see how different liquids mix or don't mix.
What YOU need.
Please bring in - By MONDAY 5/9
a clear glas or plastic jar or bottle
like a mason jar, or a water bottle, or a soda 16 oz bottle
Make sure you take the labels off
To take the labels off - just soak them over night then peel the label off.
DUE MONDAY 5/9
We are making them on MONDAY 5/9
4/27/22 Chapter 6 notes
How are mixtures classified?- Mixtures are classified as a
- Solution
- Colloid
- Suspension
- Based on the size of its largest particles
- A solution is a mixture containing a solvent and at least one solute and has the same properties throughout. It contains solute, molecules or ions that are too small to see
- Solvent = part of the solution present in the largest amount
- It dissolves the other substance
- Solute = is the substance that is dissolved by the solvent.
- Can be gases, liquids, or solids.
- Solvent = part of the solution present in the largest amount
- Water = universal solvent because so many substances can be dissolved by water
- Life depends on water solutions
- Water is the solvent in blood, saliva, sweat, urine and tears
Other Solvents- Solvents don’t have to be liquid – they can be solid, liquid or a gas
- Air is a solution of gasses
- Gasoline is a solution of liquids – none of which are water
Colloids- Colloids = a mixture containing small, undissolved particles that do not settle out.
- The particles are too small to be seen without a microscope
- But are large enough to scatter a beam of light.
- Most are not clear
- Ex fog, milk, shaving cream, smoke.
- Suspension = a mixture in which particles can be seen and easily separated by settling or filtration.
- It does not have the same properties throughout
- It contains visible particles that are larger that the particles in solutions or colloids
How Does a Solution Form?- A solution forms when particles of the solute separate from each other and become surrounded by particles of the solvent.
- Ionic and Molecular solutes
- The positive and negative ions of the solute are attracted to the partially charged polar water molecules.
- The water molecules will surround all of the ions –
- The ions will become completely dissolved
- The covalent bonds within the molecules remain unbroken
- Ionic compounds in water conduct electric current
- Solutes raise the boiling point of the solvent.
- As the temp of a liquid rises, the molecules gain energy and escape as a gas
- In a liquid solution the solute particles prevent the solvent molecules escape.
- The temp must go above the boiling point of the solvent in order for the solution to boil
- Solutes lower the freezing point of a solution below that of the solvent alone.
- When pure liquid water freezes at 0-degrees Celsius, the molecules pack together to form crystals of ice
- In a solution the solute particles get in the way of the water molecules forming ice crystals.
- The temperature must drop below 0 degrees Celsius in order for the solution to freeze.
8th Grade Science Project
Can It Be Green and Clean?
Due Wednesday May 18, 2022
Information can be found in your textbook page 193
You need to follow our lab format – The Scientific Method.
This must be done on Loose Leaf, or typed.- Name
- Date
- Title of lab
- Question
- Research/observations before the experiment
- Hypothesis – IF THEN Statement
- Materials – listed out
- Procedure – numbered out
- Results – this is the data you collected as you do the experiment
- Conclusion – my hypothesis is correct or incorrect and why – Scientifically why.
- Question for next time – what would you change or do different
- You need to find a “green” cleaner
- Make sure it is a “green” cleaner – check the ingredients.
- It can be any kind of cleaner, laundry, hand soap, shampoo, body soap . . .
- Then get a regular cleaner – not ‘green’
- Check the ingredients – what makes it not ‘green’
- Make sure it’s the same kind – laundry, hand, shampoo . . .
- Clean something with each
- You need to do three trials – do it three times
- Research – look up some of the elements in the ingredients – why are they there? What do they do? What are their properties?
4/21/22 - Test will be on Monday 4/25 on Chapter 5
4/20/22 - Textbook page 189 - 191
Study chapter 5 for a test on Friday
4/8/22 Finish worksheets. Study notes for quiz on Monday.
4/7/22 finish page 178-179
4/4/22 Read and Do page 174 - 175
4/1/22 - No Homework - No April Fools - Really no Homework!
3/31/22 complete pages 168 - 169
Study for quiz ch 5 lesson 1
3/30/22 Finish lab on pennies. Study notes for quiz on Friday
3/28/22 - the students copybooks were collected to check their work from last week - Wednesday night they will need to finish their copper lab for homework
3/24/22 - giving presentations of their super hero/villian of the periodic table
3/16/22 - We visited the Star Lab today - And we are finishing up an in-school project on the periodic table
3/14/22 - students are working on a super hero project on the periodic table. It is an in-school project that they will present to the class by the end of this week.
The Students will also have an oppertunity to visit the Star Lab this week.
2/28/22 read and do page 151 - study for quiz on lesson 4
2/25/22 Study for quiz
TEST next Thursday 3/3/22 Chapter 4
/
2/24/22 read pages 143-145
2/22/22 students need to bring in a white poster board for Monday 2/28/22
2/18/22 finish worksheets we started in class. Enrichment must be done on loose leaf. Study for quiz
2/17/22 read page 136
2/16/22 finish page 135
2/10/22 - complete assess learning worksheet - study for quiz
2/7/22 study notes
2/2/22 No Homework
2/1/22 - CSW Student Appreciation - No Homework
1/28/22 study for test on Ch 3 - study all quizzes and worksheets.
1/27/22 - study for quiz on Ch 3 sec 5
Test on Monday Ch 3
1/24/22 read and do pages 111-113
2/1/22 - tentative test on Chapter 3 - all info is on worksheets handed out
1/21/22 - study notes. Read and do pages 111 - 113
1/13/22 - Due Thursday 1/20 review worksheet, enrichment worksheet and take home quiz.
1/7/22 study notes for a quiz. Read page 102 - 103
Happy New Year 2022
1/3/22 - finish page 98
Study notes
Due Jan 11 - the Atom
8th grade Science Project
Due Jan 11
Make a model of an Atom – use the cloud model
Label each part- Nucleus and its charge
- Protons and its charge
- Neutrons and its charge
- Electrons and its charge
Tell what kind of atom it is – which element.
Have a key that tells the distance between the nucleus and the electrons.
Make sure your name is on your project and each part is labeled.
12/17/21 - study for test on Ch 3 sec 1-3 Test on Monday 12/20
12/16/21 - study notes, finish review worksheet, write definitions for three vocab words.
12/15/21 reread sec 3 for a quiz tomorrow
Test Ch 3 sec 1-3 Monday
Test Ch 3 sec 1-3 Monday Dec 20
12/10/21 Study notes from chapter 3
12/9/21 Study page 80-87 for a quiz tomorrow
12/6/21 Read and do pages 80-87
Study for a quiz
12/3/21 study notes and handout for chapter 3 lesson 1
Quiz on Monday
12/2/21 - read page 72 - 76
9/27/21 - Study worksheet, notes and vocab
TEST Friday 10/1/21 on chapter 1
9/23/21 - We are working on Sound and Light. We are almost done the chapter on Waves. Test is scheduled for Friday 10/1
Homework - Study vocab and notes
Next up Chemistry
Our student teacher, Ms Gorman, will be teaching a few of the lessons in Chemistry.
9/16/21 - study your notes
9/14/21 - Study your notes
What's the Matter? No, what is Matter - That is our first lesson! WAS our first lesson - But our books did not come in - So we are starting with Light and Sound.
We will be doing experiments, but we will need supplies. I will email you our needs when we get ready to do an experiment.
Homework - Look over notes and study vocab each night :)
9/10/21 - Read and complete page 5-6