Biology, 02.08.2019 04:30 aariyahjc9188
20points scientists use many scientific methods to answer their questions about the natural world. true false 10 points question 2 scientists ask questions based on the observations they hear about from others. true false 10 points question 3 an error in the preparation of a lab sample led alexander fleming to the discovery of the antibiotic penicillin. true false 10 points question 4 a hypothesis is an assumption about what will happen during an experiment or an observation. true false 10 points question 5 an experiment includes variables that are all kept constant. true false 10 points question 6 a well-designed experiment includes an experimental group and a control or baseline group. true false 10 points question 7 the variable group in an experiment gives you something to compare your experimental group to. true false 10 points question 8 to test their hypotheses, scientists perform carefully planned procedures called conclusions . true false 10 points question 9 sometimes, however, scientists have no choice but to conclude that they haven't answered their question. they might need to collect more data, restate their hypothesis, or design a different experiment. true false 10 points question 10 scientists communicate their findings so that others may restudy, improve, or expand them. true false
Answers: 1
Biology, 22.06.2019 00:30
On a recent expedition to a remote region of northern canada, scientists uncovered skeletal remains from about 100,000 years ago. surprisingly, all the skeletal remains, which included many species from differing biological families and spanned about two thousand years, showed evidence of experiencing temperatures in excess of 1000 degrees fahrenheit (or 538 degrees celsius). which of the following, if true, best explains the apparent paradox between the cold environment and the evidence of the bones experiencing hot temperatures? (a) chemical changes that naturally occur during the process of decay in only one north canadian species produce the same evidence of the species' skeletons being exposed to hot temperatures as the expedition scientists found. (b) a little over 103,000 years ago, a large fire is known to have occurred in northern canada. (c) strong evidence exists that as early as 70,000 years ago, homo sapiens around the world relied heavily on fire to cook animals. (d) in the same expedition and in roughly the same layer of excavation, scientists found rudimentary wood cutting and hunting tools used by early humans.
Answers: 3
Biology, 22.06.2019 03:00
What best describes the structure of the declaration of independence?
Answers: 2
Biology, 22.06.2019 04:30
What characteristic make legumes a good food source for food insecure populations
Answers: 3
Biology, 22.06.2019 08:00
Which set of terms best describes a community of miners who live out in the countryside of west virginia and use specialized geological equipment to analyze the composition of rock?
Answers: 1
20points scientists use many scientific methods to answer their questions about the natural world. t...
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