7th Science End of the Year

Front

At the beginning of the investigation, Carl recorded a total mass of 200g. After placing seltzer tablets in water, Carl again measured the mass. If the combined mass of the two seltzer tablets before they were dropped in the water was 5 g, what is the total mass at the end of Carl's investigation?

Back

205g

Front

The fizzing hydrogen peroxide is an example of a(n)

Back

chemical change taking place

Front

Which organism shown in the image is a producer? deer, grass, buzzard, All the organisms are producers.

Back

grass

Front

What is the name of the organism representing the most concentrated source of energy contained within its tissues? Options: shark, otter, abalone, plankton

Back

plankton

Front

The graph shows the changes of a grass population from 2007-2011. What do you predict most likely occurred between 2009 and 2010?

Back

an increase in grazing animals

Front

The graph shows a population estimate from 2000-2005. What most likely occurred between 2003 and 2004?

Back

There was a deadly viral outbreak.

Front

How does the energy move between the deer, grass and buzzard?

Back

The grass traps energy from the sun, and the deer consumes the grass; when the deer dies, the buzzard consumes the deer.

Front

The image shows an example of a(n) ___________________.

Back

food web

Front

In Hudson Bay, summer has arrived earlier each year since 1981. As a result, polar bears in that area have fewer offspring and lower survival rates. The population has a

Back

negative growth rate

Front

Which statement BEST describes the gas exchange illustrated?

Back

Animals release carbon dioxide that plants use in photosynthesis.