ACT Success - Science - Practice #3

Group 1

Source 1.1

• Direct sampling of current atmospheric methane levels.

• Analysis of trapped air bubbles in ice core samples.

• Measurement of methane in ocean sediments.

• Observation of solar radiation using satellite data.

• It has increased steadily.

• It has remained stable.

• It has decreased steadily.

• It has shown a cyclical pattern with no clear trend.

• Natural variability in solar radiation intensity.

• Human activities such as agriculture and industrialization.

• A natural increase in volcanic activity.

• Changes in Earth’s magnetic field.

Group 2

Source 2.1

• To determine the effect of metal ions on plant growth.

• To study seasonal variations in atmospheric pollution levels.

• To examine the impact of weather patterns on soil composition.

• To analyze the chemical composition of rainwater.

• January

• April

• September

• December

• Take measurements only in the months with the highest Cu2+ and Zn2+ levels.

• Analyze precipitation samples monthly throughout the year.

• Measure the lead content in soil rather than precipitation.

• Conduct the study only during winter months.

• Less than 2 mg/L

• Exactly 2 mg/L

• Between 2 and 3 mg/L

• More than 3 mg/L

• As the hours of sunlight increased, the plant height increased.

• As the hours of sunlight increased, the plant height decreased.

• Plant height remained constant regardless of sunlight.

• Plant height increased only up to a certain point and then decreased.

• 4.5

• 5.5

• 6.5

• 7.5

• Using three different sounds

• Testing each participant in random order

• Giving each participant a break between sounds

• Recording reaction times for each participant

• Evidence shows that global temperatures have fluctuated naturally over the past 500,000 years.

• The levels of greenhouse gases in the atmosphere have increased significantly since the Industrial Revolution.

• Ice cores show temperature changes that align with Earth’s natural climate cycles.

• Volcanic eruptions have been linked to short-term increases in atmospheric temperature.

• The birds in question have not shown any genetic changes in the last decade.

• The climate in the birds' migratory region has warmed by an average of 2°C over the past decade.

• Observations show that other species in the same area are also migrating earlier.

• Some birds that migrated earlier had a higher survival rate.