beta emission
alpha emission
fission
Answer: A: fusion
Ex:
helium
B.
hydrogen
C.
lithium
D.
oxygen
E.
zinc
Answer: option B. Hydrogen
Explanation:
Answer : The procedure to separate the mixture of sugar, black pepper and pebbles would require physical methods.
First step is to pass the mixture through a grid that traps the pebbles in it and allows the passage of black pepper and sugar from it or alternatively, physically hand-picking up the pebbles can also be done.
Next step is to add water to the mixture to the sugar and black pepper, stir this solution until all the sugar dissolves in the water. Then pass this solution from a filter paper and collect the filtrate in a beaker.
The residue would contain the black pepper on it, it can be dried after separation.
To obtain the sugar which is dissolved in water, one can evaporate the water in it and get the sugar at the bottom of the beaker.
The ways scientists do investigations is observational studies, surveys and questionnaires and case studies,
Scientists use various methods to conduct investigations and explore the natural world. These methods include:
1. Observational Studies: Scientists carefully observe and record natural phenomena or events without intervening or manipulating the environment. Observational studies are often used in fields such as astronomy, ecology, and anthropology.
2. Experimental Studies: Scientists design controlled experiments to test specific hypotheses or investigate cause-and-effect relationships. In experiments, variables are manipulated and controlled to observe their impact on the outcome. This method is common in chemistry, physics, and biology.
3. Surveys and Questionnaires: Researchers use surveys and questionnaires to gather data from a large number of individuals to assess opinions, attitudes, behaviors, or preferences. This method is prevalent in social sciences and market research.
4. Case Studies: In-depth investigations of a particular individual, group, or situation are conducted to gain detailed insights. Case studies are commonly used in psychology, medicine, and sociology.
5. Field Studies: Scientists conduct research directly in the natural environment, collecting data in real-world settings. Field studies are common in geology, environmental science, and wildlife biology.
To know more about investigations here
#SPJ6