give a direction for the experiment D. make the E. xperiment more difficult 相关知识点: 试题来源: 解析 C。解析:在科学探究中形成假设的目的是为实验提供一个方向。选项 A 证明假设总是正确的是错误的,假设需要通过实验来验证;选项 B 只是猜测结果不准确;选项 D 使实验更困难不是目的。
There are usually four steps in the scientific method,including observation (观察),hypothesis(假设),experiment,and conclusion.The steps may not always be completed in the same order,but the first step is usually observation and asking a question about your observation.For example,you had a sick ...
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the gravitational force is low in the mountains C . the sunlight is high in the higher elevations D . All of them 第7题 单选题 (1分) What skill is a scientist is using when s/he listens to the sounds that the birds make. A . Formulating a hypothesis B . Interpreting data C . ...
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-- is that scientists use "the scientific method." If you've got a high school science textbook lying around the house, you'll probably find that answer in it. But this answer is wrong. But what is5declared to be the scientific method -- develop a hypothesis(假设), then design an exp...
This hypothesis can therefore not be confirmed. Likewise, we expected that student teachers would be able to outperform pre-university students on the Test for Grammatical Understanding (TGU). Surprisingly, while the student teachers did manage to outscore their secondary school counterparts before the...
To explore the “grandmother effect” hypothesis (假设), experts examined nearly 200 years’ worth of French-Canadian population records from the 17th and 18th centuries. “At the time, life was tough. 2 ” But the researchers found that having a grandmother still alive was a definite plus....
It is a hypothesis, but the comparison of hundreds of whistles and rattles clearly showed that different whistles usually had different frequency track and duration, while different rattles quite often resembled more graded variation on the same theme. These variations do not appear when a male ...
Hypothesis (1) is compatible with data indicating that, only 10% or less of the channels forming a gap junction plaque are in the open state, and therefore the averaging procedure intrinsic in the generation of the crystal structure data more closely reflects that of a closed channel. ...