WorksheetsCommon Assessment 1 Postview
Total questions: 22
Worksheet time: 20mins
Which of the following is correct?
reactants ← products
reactants products
reactants → products
reactants = products
Plants perform a chemical reaction known as photosynthesis in which light energy is converted into chemical energy in the form of sugars. The chemical equation for photosynthesis is displayed. Which statements accurately describe the chemical reaction process that plants undergo? Select TWO correct answers.
No new substances are produced during the process of photosynthesis since it is a chemical reaction.
There are more carbon (C) atoms on the products side of the equation than there are on the reactants side.
A new substance is produced during photosynthesis because photosynthesis is a chemical reaction.
There are fewer hydrogen (H) atoms on the products side of the equation than there are on the reactants side.
The number of oxygen (O) atoms is the same on the reactants and products side of the chemical reaction.
A student creates a mixture of water and washing soda weighing 10 g and a mixture of water and epsom salts weighing 15 grams. He knows that when he mixes the two substances a chemical change will occur. According to the law of conservation of mass, what should the weight of the products be after he mixes them?
10g
15g
5g
25g
This equation describes the chemical reaction that occurs during photosynthesis.
6CO2 + 6H2O → C6H12O6 + 6O2
How many elements does C6H12O6 contain?
3
6
12
24
The chemical formula for sulfuric acid is H2SO4. Which of the following statements accurately describe the atoms involved in the formula for sulfuric acid?
Select TWO correct answers.
There are 4 sulfur (S) atoms involved in the chemical formula.
There are twice as many hydrogen (H) atoms as there are sulfur (S) atoms.
There are twice as many sulfur (S) atoms as there are hydrogen (H) atoms.
There are twice as many oxygen (O) atoms as there are hydrogen (H) atoms.
There are 6 total atoms involved in the chemical formula.
A group of students are describing the chemical formula displayed below. C3H7NO2
What information would accurately complete the statement? Move ONE correct answer to each box.
There are (a) elements and (b) total atoms involved in the chemical formula displayed.
Use the chemical formula displayed below to complete the following statements by selecting the correct answers from the drop-down menus. H3PO4 In the chemical formula displayed above, there are (a) different elements and (b) total atoms. There are (c) more oxygen (O) atoms than there are phosphorus (P) atoms.
Select all the correct answers.
Robert and Veronica are creating examples of physical and chemical changes occurring in matter. Which of the following are examples of a physical change? Choose ALL correct answers by clicking the appropriate boxes. There will be more than one answer.
Drag and drop the correct choice to each blank.
Physical Changes include: tearing paper, breaking glass, and (a) .
Chemical changes include: burning wood in a fire, (b) , and boiling an egg.
Which of the following kitchen activities are examples of a physical change?
Select THREE correct answers.
What would be the BEST title for Column A?
Physical Changes
Things That Don't Change
Physical Changes Followed by Chemical Changes
Chemical Changes
Drag and drop the correct answer choice to each answer blank.
Complete the following statements by moving the answers to the correct boxes.
(a) occurs when a substance undergoes a change in appearance, such as (b) . (c) occurs when a new substance is formed, with an evidence being (d) .
What occurred in the diagram?
A physical change, because a solid formed when the two liquids combined
A chemical change, because a yellow substance formed when the two liquids combined
A chemical change, because the volume of the final solution was larger than the initial solutions
A physical change, because the temperature changed with no outside source applied
Valon cut a cold apple into slices, placed the slices on a plate, and left the plate on the kitchen counter. Over the next two hours, Valon observed that the apple slices started to dry out and turn brown. He also noted that the apple slices warmed to room temperature, and a couple of fruit flies started to fly around them. Which of Valon's observations provides evidence of a chemical reaction?
The apple slices changed color.
The apple slices dried out.
The apple slices became warmer.
The apple slices attracted fruit flies.
Which statements accurately describe the substances shown in the table?
Select TWO correct answers.
All substances in Group A can be broken down into two or more different types of matter.
Fe2O3 is made up of five different types of matter.
O2 is a molecule made up of two atoms, but not a compound.
All substances in Group B are considered compounds because they are made of one type of matter.
All substances in Groups A and B are considered elements because they can be broken down into two or more types of matter.
Miguel's lab group is conducting an experiment that involves dissolving different amounts of sugar and salt into water in glass test tubes.
Which safety procedure is the MOST appropriate for this experiment?
Use a lead apron to protect against radiation.
Hold the scalpel away from the body to cut.
Have a fire extinguisher near the table.
Wear safety goggles.
This question has two parts. First, answer Part A. Then answer Part B.
Part A
Four students were asked to identify each substance as either an element or a compound. The chart shows their answers.
Which student identified them ALL correctly?
LIlly
Devon
Ignacio
Linn
During an experiment, a student placed a malleable item in the gap of the circuit as shown in the image. The lightbulb turned on when the item was connected to the circuit. Complete the following statement by moving the answers to the correct boxes.
The malleable item placed in the gap of the circuit is a (a) because it (b) electricity.
(a) are shiny, very malleable, especially when heated, and both heat and electricity flow through easily.
(b) look dull instead of shiny. They are brittle and do not allow the flow of heat or electricity.
(c) can be shiny or dull. They can be flexible or brittle. Also, they can conduct heat and electricity, but not very well.
In science class, five students are given different samples and asked to do two tests on them. The observations they made from the tests are in the table.
Select TWO students who most likely have a nonmetal.
Student 1
Student 2
Student 3
Student 4
Student 5
(a) is yellow, breaks easily, and does not reflect light, so it is probably a (b)
(c) is solid, reflects light, and is not a good conductor of electricity, so it is probably a (d)
A fire blanket would be used when
the lab equipment is on fire
a lab partner is on fire
the teacher's car is on fire
