Biology, 23.09.2020 17:01 rachel63892
Which of the following is always an indication of a chemical change?
A. The total mass of material changes
B. A solid turns into a liquid
C. One substance dissolves into another substance
D. A new substance is produced
Answers: 3
Biology, 22.06.2019 02:00, iixyloa
Research cheetahs on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? -cheetah how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.
Answers: 3
Biology, 22.06.2019 02:30, ComicSans10
Sally and sue were investigating the topic of friction in science. they used a small car and a ramp as seen in the picture to test what they were learning. they knew that they slipped easily on waxed floors but not on carpet, so they decided to change the material on the surface of the ramp to see what happened. they planned to use glass, carpet, aluminum foil, and sandpaper and run the car down the ramp over each surface. what would be the best research question to guide the girls' experiment? a) does the amount of surface area affect the friction on the moving car? b) will the car travel fastest on the glass surface? c) how does the angle of the ramp affect the speed of the car? d)do rougher surfaces tend to create more friction than smooth surfaces?
Answers: 1
Biology, 22.06.2019 09:00, michael3592
Temperatures in ponds and lakes vary by season. select the best answer from the choices provided t f
Answers: 2
Biology, 22.06.2019 10:00, TheOneandOnly003
If an organ has six haploid chromosomes, how many chromosomes are present. 6 12
Answers: 1
Which of the following is always an indication of a chemical change?
A. The total mass of material...
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