Chemistry, 17.11.2020 20:00 kinderc9330
A teacher is demonstrating physical and chemical changes to her class. Which action should they use to demonstrate a chemical change?. Single choice.
(5 Points)
Cutting a piece of paper with scissors.
Ripping a piece of paper with their hands.
Burning a piece of paper with a match.
Folding a piece of paper into an airplane.
Answers: 3
Chemistry, 21.06.2019 23:30, mastershadow2018
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 17:00, davisnaziyahovz5sk
The arrangement of particles is most ordered in a sample of
Answers: 1
Chemistry, 23.06.2019 03:00, andrejr0330jr
Which of the following is a chemical property of water at 4 c
Answers: 2
A teacher is demonstrating physical and chemical changes to her class. Which action should they use...
French, 21.04.2021 19:00
Mathematics, 21.04.2021 19:00
Mathematics, 21.04.2021 19:00
Mathematics, 21.04.2021 19:00
Mathematics, 21.04.2021 19:00