Chemistry, 26.10.2021 01:50 gunnatvinson
Submit your recorded observations for each step.
Step 1: Burning Candle - record the mass and write your observations
Step 2: Cooling Candle - record the mass and write your observations
Step 3: Tearing paper - record your observations
Step 4: Wet paper - record your observations
Step 5: Burning pieces of paper - record your observations
Step 6: Salt and water in test tube - record your observations
Step 7: Baking soda and vinegar - record your observations
Answer the following questions.
What is the difference between a physical change and a chemical change?
What kind of change occurred in each test? What evidence do you have to support your decision? Be brief, but be sure to defend your conclusion with data.
Answers: 3
Chemistry, 21.06.2019 23:30
Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.
Answers: 2
Chemistry, 22.06.2019 05:30
Which of the following two events occur to create a sea breeze? select all that apply. warm air rises on the ocean and moves toward the land to cool warm air rises on land and moves toward the ocean to cool cool air moves from the ocean to be warmed by the land cool air moves from the land to be warmed by the ocean
Answers: 3
Chemistry, 22.06.2019 22:30
Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.
Answers: 2
Submit your recorded observations for each step.
Step 1: Burning Candle - record the mass and writ...
Biology, 05.05.2020 00:38
Chemistry, 05.05.2020 00:38
Mathematics, 05.05.2020 00:38
Mathematics, 05.05.2020 00:38
English, 05.05.2020 00:38
Mathematics, 05.05.2020 00:38
Social Studies, 05.05.2020 00:38
English, 05.05.2020 00:38