How has scientific understanding about the composition of the universe changed over time? Select the TWO correct answers.
A. The percentage of dark energy has shrunk in the scientists' estimates
B. The percentage of dark matter has shrunk in scientists' estimates since the 1980's
C. The percentage of ordinary matter has grown in scientists' estimates
D. The percentage of unknown materials has grown in scientists' estimates since the 1970s
C. The percentage of ordinary matter has grown in scientists' estimates
D. The percentage of unknown materials has grown in scientists' estimates since the 1970s
The correct answers are:
C. The percentage of ordinary matter has grown in scientists' estimates over time.
D. The percentage of unknown materials has grown in scientists' estimates since the 1970s.
To determine the correct answers, we need to analyze the options in terms of how our scientific understanding about the composition of the universe has changed over time.
A. The percentage of dark energy has shrunk in the scientists' estimates:
To assess whether this is true or false, one can look for research or studies conducted on the topic. Exploring scientific literature that examines our understanding of dark energy over time can provide insights. By reviewing multiple sources, one can determine if there has been a trend of the shrinking estimation of dark energy.
B. The percentage of dark matter has shrunk in scientists' estimates since the 1980s:
Similar to the previous option, analyzing scientific literature related to dark matter estimation over time can help verify this statement. Comparing different studies conducted since the 1980s can reveal any changes in the estimates of dark matter.
C. The percentage of ordinary matter has grown in scientists' estimates:
To determine if this statement is correct or not, one can investigate the progress made in understanding ordinary matter in the universe. Scientific articles and papers discussing advancements in the estimation of ordinary matter can provide valuable information.
D. The percentage of unknown materials has grown in scientists' estimates since the 1970s:
In order to evaluate the accuracy of this statement, it is necessary to examine scientific literature and studies regarding unknown materials in the universe. Looking for research conducted since the 1970s can help identify any changes in the estimation of unknown materials.
By gathering and critically evaluating information from reliable sources and scientific studies, one can identify the two correct answers to the question about how our scientific understanding of the composition of the universe has changed over time.