Science Core Competency 8 by Ratna Narayan

Core Competency 8: Physical and Chemical Properties

ratnarayan — 2021-12-14 11:41:29 UTC

The teacher understands the physical and chemical properties of and changes in matter.
The beginning teacher:
A. Describes and measures the physical and chemical properties of substances (e.g., size, shape, temperature, magnetism, hardness, mass, conduction, density).
B. Describes the physical properties of solids, liquids and gases.
C. Distinguishes between physical and chemical changes in matter.
D. Applies knowledge of physical and chemical properties (including atomic structure) of and changes in matter to processes and situations that occur in life and in earth and space science.
E. Distinguishes between elements, compounds, mixtures and solutions and describes their properties.
F. Describes and explains the occurrence and importance of a variety of chemical reactions that occur in daily life (e.g., rusting, burning of fossil fuels, photosynthesis, cell respiration, chemical batteries, digestion of food).

1. From Pearson Preparation Manual

ratnarayan — 2021-12-14 11:42:14 UTC

Of the following mixtures, which can be most effectively separated into its components using a mesh screen?

Oil and water
Sand and water
Sand and pebbles
Table sugar and water

2014, question 17

2022-01-27 18:47:31 UTC

key words: liquid
answer: b

2013 Q 10

2022-01-27 19:02:12 UTC

Key/vocab words: powder, beaker, mixture, property

2013 Q 14

2022-01-27 19:18:10 UTC

Key words: temperature water, heated, celsius

2013 STAAR

tianasmith803 — 2022-01-27 19:20:44 UTC

2014 STAAR

tianasmith803 — 2022-01-27 19:35:06 UTC

Key words: dropped, foam cups, keys, and coins, method, objects
Content words: less dense, density, same density
- Morning group #3

2013 Q 21

2022-01-27 19:38:02 UTC

Answer : B
plastic, glass, and steel

Chaney Clements- Q2 2017

chaneylee12 — 2022-01-28 01:19:23 UTC

Key Words: Periodic table, Elements, Electrons.

2017 Q 35

sydneyrussell2015 — 2022-01-28 01:35:43 UTC

Vocabulary: Observe Key Words: Water at Room Temp, Stirred Contents

2018 Q:16 Group 2

2022-01-28 01:37:11 UTC

Answer: J
Keywords/ Vocabulary: properties, liquid, soluble, magnet

2017. Question 30

2022-01-28 01:46:20 UTC

Answer: G

Monica Escalante-Q.3/2019

2022-01-28 01:48:53 UTC

Keywords: Physical properties, substances, energy, water

2017 Question 30

2022-01-28 01:51:21 UTC

Key words- Density, magnet, magnetic, physical properties
answer: G

2019 STAAR Question 16

2022-01-28 01:52:05 UTC

Key Word/ Vocab: Circuit, Switch, Opened

2017 Question 23

2022-01-28 01:59:38 UTC

Key words/ Vocab: gravel, water, NOT, seperate

Monica Escalante-Q.4/2019

2022-01-28 02:01:31 UTC

Keywords: change, mixed, water

STAAR 2022

2022-01-28 16:31:14 UTC

A student mixes a sample of soap is bowl of stones with a sample of stable salt. The mass and volume of the samples were determined before mixing the samples. The mass and volume of each sample is shown.
Material: Grams: Mililiters:
Stones. 45. 25
Salt. 40. 35

Which statement os true about the mixture?
A: The mass of the mixture is 85 grams
B: the mass of the mixture is 60 milliliters.
C: the volume of the mixture is 60 grams.
The volume of the mixture is 85 milliliters

Answer: F
Vocabulary terms: mass, volume, grams , milliliters

Kimberly Mares -STAAR 2021

2022-01-30 04:45:39 UTC

Q16 Keywords: physical properties

STAAR 2021

2022-02-03 19:58:03 UTC

Answer F
vocabulary: mass volume

STAAR 2021

2022-02-03 20:47:46 UTC

vocabulary - conclusion, soluble, dense

Estela Cedillo- 2015 STAAR Grade 5

estelacedillo — 2022-02-10 19:46:50 UTC

Key Words: substance, gas, shape, container, ONLY, small particles, cube, shaped, observations, shiny, visible, cold, crystals, gas
Answer H

2015. Q 23

2022-02-10 19:55:54 UTC

Key words: physical properties, classify

2016 STAAR

ashleylozano2018 — 2022-02-10 20:04:25 UTC

Vocabulary: Compare, mass, observations Answer: G

2013 STAAR

tianasmith803 — 2022-02-10 20:04:54 UTC

Key words: Mass, grams, temperatures, melted, volume - Morning Group 3

Estela Cedillo STAAR 21015 Grade 5

estelacedillo — 2022-02-10 20:27:20 UTC

Key words: properties, four objects, hand lens, magnet, beaker, water, identifies, property, classify,
Answer: F

Estela Cedillo- 2015 STAAR Grade 5

estelacedillo — 2022-02-10 20:41:56 UTC

Keywords:observed, liquid, wax, dripping, down, burning, candle, flame, several, hours, later, no longer, liquid
Keywords: G

Estela Cedillo- 2015 STAAR Grade 5

estelacedillo — 2022-02-10 20:55:49 UTC

Answer: D
Keywords: students, adds, grams, four, different, powered, solids, different, beakers, 10ML, water, each, stirs, mixtures, sit, half, hour, recording, observations, most likely, answer, investigation

STAAR 2014

2022-02-11 01:35:51 UTC

Keywords: ingredients, placed in hot water, physical property, sugar cubes, salt, cooking oil, carrots, butter, solid, liquid, sinks, floats, dissolves. - Morning Group #3

Lizbeth Espino-G4- 5th 2021

lizbethespino07 — 2022-02-11 01:59:31 UTC

Vocabulary/Key words: matter, conducts electricity & heat, soluble, solid, liquid, "conclusion"

Zawng Man-Group 4, Question 5, 2018

kczawngman — 2022-02-11 02:12:51 UTC

Voca/key words: physical properties, most likely

2019 Staar

2022-02-11 02:16:03 UTC

Key words: Sand dune, road, fence
Answer: F

Steve Cipriano - 2021 STAAR #16

djstibs — 2022-09-22 22:54:13 UTC

Keywords: physical properties, soluble, physical state.
Answer: J

Gissel Ayala-STAAR 2021/Q27

2022-09-22 23:04:39 UTC

Keywords: same, size, floats, sinks, conclusion, best supported

Christine 2021 q.32

christinej1718 — 2022-09-23 00:35:49 UTC

Key words: mass, volume, samples, mixing, mixture

2021 Q4- Julia Pughes

2022-09-27 18:47:11 UTC

Answer- G
Keywords- conducts electricity, conducts heat, soluble in water, and physical state at room temperature

question 15 Answer B

2023-01-18 15:49:23 UTC

Which of the following best describes an electron?

A It has no charge and about the same mass as a proton.

B It has a negative charge and much less mass than a proton.

C It has a positive charge and much more mass than a neutron.

D It has a negative charge and about the same mass as a neutron.

question 18 Answer F

2023-01-18 15:55:30 UTC

A scientist spilled a few drops of dilute hydrochloric acid (HCl) on a lab table. For safety purposes, the scientist sprinkled some baking soda (NaHCO3) onto the spill. Which observation would provide the best evidence that a chemical reaction occurred?

F The baking soda and hydrochloric acid combined, and bubbles formed.

G The baking soda absorbed the hydrochloric acid.

H Some of the baking soda dissolved in the hydrochloric acid.

J The hydrochloric acid evaporated, leaving only the baking soda.

question 20 Answer J

2023-01-18 16:03:08 UTC

Which information could a student determine from only the chemical formula of a protein?

F The color of the protein

G The number of molecules in each sequence that makes up a protein

H The physical arrangement of atoms in the structure of the protein

J The number of atoms of each element in the protein?v

question 23 Answer D

2023-01-18 16:09:42 UTC

A teacher asks a student to write the chemical equation for photosynthesis. The student’s response is shown below.

CO2 + H2O light C6H12O6 + O2
The equation is not balanced correctly. Which of these is a balanced equation for

photosynthesis?
A 12CO2 + H2O light C6H12O6 + O2

B CO2 + 9H2O light C6H12O6 + O2
C CO2 + H2O light 3C6H12O6 + O2
D 6CO2 + 6H2O light C6H12O6 + 6O2

STAAR 2013 Question 40 Answer H

salasceciliacruz — 2024-07-18 19:17:57 UTC

STAAR 2015 Question 29 Answer B

salasceciliacruz — 2024-07-18 20:06:43 UTC

STAAR 2015 Question 42 Answer F

salasceciliacruz — 2024-07-18 20:14:33 UTC

STAAR 2016 Question 1 Answer A

salasceciliacruz — 2024-07-18 20:31:25 UTC

STAAR 2016 Question 12 Answer H

salasceciliacruz — 2024-07-18 20:48:58 UTC

STAAR 2016 Question 29 Answer C

salasceciliacruz — 2024-07-18 20:58:50 UTC

STAAR 2016 Question 40 Answer F

salasceciliacruz — 2024-07-18 21:05:36 UTC

STAAR 2018 Question 9 Answer B

salasceciliacruz — 2024-07-18 21:55:36 UTC

STAAR 2018 Question 23 Answer B

salasceciliacruz — 2024-07-18 22:01:46 UTC

STAAR Question 29 Answer C

salasceciliacruz — 2024-07-18 22:05:24 UTC

STAAR 2019 Question 7 Answer A

salasceciliacruz — 2024-07-19 16:53:58 UTC

STAAR 2022 Question 4 Answer J

salasceciliacruz — 2024-07-19 17:22:14 UTC

STAAR 2022 Question 16 Answer H

salasceciliacruz — 2024-07-19 17:32:23 UTC

STAAR 2022 Question 18 Answer J

salasceciliacruz — 2024-07-19 17:35:23 UTC

STAAR 2022 Question 31 Answer A

salasceciliacruz — 2024-07-19 17:50:24 UTC

STAAR 2023 Question 1

salasceciliacruz — 2024-07-19 18:02:06 UTC

Answer:

The salt will dissolve.
The water will remain clear.

STAAR 2023 Question 3 Answer C

salasceciliacruz — 2024-07-19 18:04:17 UTC

STAAR 2023 Question 24 Answer A

salasceciliacruz — 2024-07-19 18:19:34 UTC