Biology, 12.10.2020 20:01, gearchanger52p02zf8
1.A chemical change is different than a physical change because in a chemical change
a. Chemicals are used
b. Molecules do not physically touch
c. A new substance is formed and in a physical change no new substance is formed
d. The change can be seen but in a physical change it cannot
2.Which of the following is a physical change?
a. Burning
b. Freezing
c. Rusting
d. Oxidation
3.Jamal combined baking soda and vinegar, but he is having trouble determining if what he observed is a chemical reaction or a physical change. Choose two answers that demonstrate evidence of a chemical change?
a. Change in color
b. Absorption of heat
c. No change on properties
d. Formation of new substances
4. In a chemical reaction, if the reactants are heated, the reaction usually happens
a. Faster
b. Slower
c. At the same rate
d. In a smaller volume
Explain why your answer is correct:
Answers: 1
Biology, 22.06.2019 13:30, nstacie40
Color blindedness is a sex-linked trait. if we could see the pedigree chart for several more generations of the family illustrated here, we would expect a) more males to be color blind. eliminate b) more females to be color blind. c) no females to ever be color blind. d) an equal number of males and females that are color blind.
Answers: 2
Biology, 22.06.2019 19:30, antionette1
Can someone give me the answer to this question? you so much
Answers: 1
Biology, 22.06.2019 20:30, scheyennekreger
How does the fossil record provide evidence that the modern whale evolved from the anthracotheres? a) the modern whale looks like their ancestor the anthracotheres. b) the modern whale has all of the same structures as their ancestor. c) there is not enough evidence to suggest the the modern whale evolved from the anthracotheres. d) the anthracotheres has a structure that is still present in the modern whale, but is no longer of use to the modern whale.
Answers: 1
1.A chemical change is different than a physical change because in a chemical change
a. Chemicals a...
Chemistry, 14.10.2019 09:50
English, 14.10.2019 09:50
Physics, 14.10.2019 09:50