Quarterly review Your turn Independent Dependent Relationship Workload

Quarterly review

Your turn Independent Dependent Relationship • Workload • Beats/minute • Direct

Testable Hypothesis or not Many people use flowers for food not

Testable Hypothesis or not Plants that receive more water will grow more flowers. Yes, testable

Testable Hypothesis or not If a flower is large then it received a lot of water while growing No, because of past tense

Your Turn A toy hammer has a mass of 44 g. It is placed in water to get the volume. What is the density of the hammer? 44/4= 11 g/m. L

Your Turn A rock with a mass of 12 g was placed in a graduated cylinder to calculate the volume. What is the density of the rock? 12/3= 4 g/m. L

Your turn Solid changes to a liquid at the _______ point. Melting

Your turn During a phase change, what does the temperature do? Stay the same

Your Turn Which moves the most rapidly? Gas

Your turn Which has a smaller volume in the picture? solid

Your Turn What is the atomic mass? 16. 00

Your Turn Which letter shows the atomic number? D

Your Turn Hydrogen (H) and Oxygen (O) combine to make water (H 2 O). Hydrogen and Oxygen are both_____. Elements

Your Turn How many protons do lithium (Li) atoms have? 3

Reminders Think! 1. What is it asking for? 2. What are they testing me on? 3. What do I already know? If you’re stuck circle that number on the answer sheet and come back to it.

Matter Review

21. Find the hypotheses • a. Heat will flow from warmer matter to colder matter. • b. If a plant is tall then it received lots of water while growing. • c. Nothing travels faster than the speed of light. ____ • d. Ice cream tastes better than pizza. ____ • f. All events in your life are controlled by the movement of the stars. ______ • g. Water that has salt will boil faster than water without salt. _______

20. Graphs Independent: Mileage Dependent: Car’s value Relationship: Inverse

19. Graphs Independent: Bottom edge Dependent: Area Relationship: complex

18. Graphs Independent: Dependent: Relationship: Speed Heart rate Direct

17. Density If an object with a density of 2. 7 g/cm 3 is placed in a fluid with a density of 2. 3 g/cm 3 the object will _____. Sink

16. Density • Platinum has a density of 20 g/cm 3. Water has a density of 1 g/ml. Which of the following has the lowest mass? – 2 cm 3 of platinum – 4 cm 3 of platinum – 50 ml of water – 80 ml of water 2 cm 3 of platinum (2 x 20=40)

15. Density Mass measures the amount of _________ in an object. Matter

13. If a liquid is cooled and the temperature decreases, the molecules move faster or slower? ______ slower

12. Rubber is a ____________ solid. amorphous

11. Salt is a _____________ solid. crystalline

10. • In which phase of matter do the molecules move most rapidly? – Solid – Liquid – Gas

9. • In which phase of matter do the molecules move least rapidly? – Solid – Liquid – Gas solid

8. You can tell the atomic mass from the atomic number because the atomic mass has a _______ point. Decimal

7. If an atom has 12 protons, how many electrons does it need for the total charge to be zero (neutral)? ____ 12

6. Neon has an atomic number of 10. How many protons does neon have? _______ 10

5. The atomic number is the number of ______. Protons

4. An oxygen atom has a mass of 17 and 8 protons. What is its atomic number? _______ 8 Bonus question: How many neutrons does it have? 9 17 -8=9

3. • Circle the words that are elements. – Air – Helium (He) – Hydrogen (H) – Sunlight – Iron (Fe) – Water

2. • Why do all atoms of an element have the same chemical properties? – They have the same size electrons – Their electrons all have the same charge. – They all have the same number of protons – They all have the number of neutrons

1. • How many elements are there? – Three – Four – About 100 – Many millions